【单选题】【消耗次数:1】
<img title=无标题415.jpg alt=无标题415.jpg src=https://huaweicloudobs.ahjxjy.cn/39CF5309B7608E88995764FE288CD8B0.jpg/>
<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/E748D6574C408C93B7B80461A8099E47.png data-tex=A=3A,{ R }_{ 1 }=\frac { 50 }{ 3 } \Omega ,{ R }_{ L }=6\Omega ,{ { X }_{ L } }=8\Omega />
A=3A<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/AE8788B340FB8FA4A16969F73DD8AD81.png data-tex=A=3A,{ R }_{ 1 }=\frac { 50 }{ 3 } \Omega ,{ R }_{ L }=8\Omega ,{ X }_{ L }=6\Omega />
<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/2CA74832418B0B563849DB17F5411CC5.png data-tex=A=3A,{ R }_{ 1 }=6\Omega ,{ R }_{ L }=\frac { 50 }{ 3 } \Omega ,{ X }_{ L }=6\Omega />
<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/4905E43D8F71453F445B49487198301F.png data-tex=A=5A,{ R }_{ 1 }=\frac { 50 }{ 3 } \Omega ,{ R }_{ L }=6\Omega ,{ X }_{ L }=8\Omega />
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相关题目
【单选题】 令前提: <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/151E88A53D653382F547CC2EA5D9CEBC.png data-tex=\forall />x(F(x)<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto /> (G(a) <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D50FEE5510C853C83F78D440017D8E6B.png data-tex=\wedge />R(x))), <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />xF(x),则下面不是其有效结论的是:
①  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />x(F(x) <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D50FEE5510C853C83F78D440017D8E6B.png data-tex=\wedge />R(x))
②  G(a)
③  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/151E88A53D653382F547CC2EA5D9CEBC.png data-tex=\forall />xR(x)
④  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />xR(x)
【单选题】 设 F(x):x 为有理数, R(x):x 为实数, G(x):x 是整数,令前提: <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/151E88A53D653382F547CC2EA5D9CEBC.png data-tex=\forall />x(F(x) <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto />R(x)), <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />x(F(x) <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D50FEE5510C853C83F78D440017D8E6B.png data-tex=\wedge />G(x)),则下面不是其有效结论的是:
①  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />x(R(x) <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D50FEE5510C853C83F78D440017D8E6B.png data-tex=\wedge />G(x))
②  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/151E88A53D653382F547CC2EA5D9CEBC.png data-tex=\forall />xF(x)
③  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />xR(x)
④  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />xG(x)
【单选题】 设<img class=jc-formula data-tex={ X }_{ 1 },\cdots ,{ X }_{ n } src=https://huaweicloudobs.ahjxjy.cn/8159F7186DE77C735294288BB1F8C1F1.png style=vertical-align: middle;/>是来自总体<img class=jc-formula data-tex=X src=https://huaweicloudobs.ahjxjy.cn/18E2773B1E2835B209E7E51B85285E80.png style=vertical-align: middle;/>的样本,且<img class=jc-formula data-tex=EX=\mu src=https://huaweicloudobs.ahjxjy.cn/39618736AA44811087C44938D156DBC3.png style=vertical-align: middle;/>,则下列是<img class=jc-formula data-tex=\mu src=https://huaweicloudobs.ahjxjy.cn/44B6A27E434C1345C3CEEB7A5249665D.png style=vertical-align: middle;/>的无偏估计的是
①  <img class=jc-formula data-tex=\frac { 1 }{ n } \sum _{ i=1 }^{ n-1 }{ { X }_{ i } } src=https://huaweicloudobs.ahjxjy.cn/C47B85208815D85D3DD90DFEC473F7FF.png style=vertical-align: middle;/>
②  <img class=jc-formula data-tex=\frac { 1 }{ n-1 } \sum _{ i=1 }^{ n }{ { X }_{ i } } src=https://huaweicloudobs.ahjxjy.cn/F592094A4BE03E45216F0FE940311E37.png style=vertical-align: middle;/>
③  <img class=jc-formula data-tex=\frac { 1 }{ n } \sum _{ i=2 }^{ n }{ { X }_{ i } } src=https://huaweicloudobs.ahjxjy.cn/72F0F6F417A0E32959CC0BA9BC395311.png style=vertical-align: middle;/>
④  <img class=jc-formula data-tex=\frac { 1 }{ n-1 } \sum _{ i=1 }^{ n-1 }{ { X }_{ i } } src=https://huaweicloudobs.ahjxjy.cn/1C176141AB6A855E8CFD52AEF5D595C0.png style=vertical-align: middle;/>
【单选题】 令前提: <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />xF(x)<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto /> <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/151E88A53D653382F547CC2EA5D9CEBC.png data-tex=\forall />y((F(y)<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/7BA9C8923F2F9C5684519175C6A722C4.png data-tex=\vee /> G(y))<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto /> R(y)), <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />xF(x),则下面不是其有效结论的是:
①  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />xR(x)
②  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/151E88A53D653382F547CC2EA5D9CEBC.png data-tex=\forall />y((F(y) <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/7BA9C8923F2F9C5684519175C6A722C4.png data-tex=\vee /> G(y))<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto /> R(y))
③  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/117E6A630A0200497B87D15B90307923.png data-tex=\exists />x(F(x)<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/7BA9C8923F2F9C5684519175C6A722C4.png data-tex=\vee /> G(x))
④  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/151E88A53D653382F547CC2EA5D9CEBC.png data-tex=\forall />x(F(x)<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/7BA9C8923F2F9C5684519175C6A722C4.png data-tex=\vee /> G(x))
【单选题】 2-7 题图2-7所示电路中,已知<img class=jc-formula data-tex={ R }_{ 1 }={ R }_{ 3 }={ R }_{ 4 }={ R }_{ 6 }=2\Omega src=https://huaweicloudobs.ahjxjy.cn/E4DC496D3FA8D6D0AF9254E0C4E28DCD.png style=vertical-align: middle;/>,<img class=jc-formula data-tex={ U }_{ s4 }={ U }_{ s6 }=2V src=https://huaweicloudobs.ahjxjy.cn/B47BDCC1EC94FE7225CB3553231ECDE3.png style=vertical-align: middle;/>,<img class=jc-formula data-tex={ I }_{ s2 }=1A src=https://huaweicloudobs.ahjxjy.cn/312515465DB0B9B2E0F922FDA1EBA3E5.png style=vertical-align: middle;/>,<img class=jc-formula data-tex={ g }_{ m }=0.5 src=https://huaweicloudobs.ahjxjy.cn/71E615683C83496EA1974F5191F01F40.png style=vertical-align: middle;/>,应用回路电流法计算电流<img class=jc-formula data-tex=I src=https://huaweicloudobs.ahjxjy.cn/CFE0FB65A01B097AD2957AEA6E52A94D.png style=vertical-align: middle;/>。<img src=https://huaweicloudobs.ahjxjy.cn/AE1D024C790835C0CA6EEDB5118BFC38.png title=2-7.PNG alt=2-7.PNG/>
①  <img class=jc-formula data-tex=\frac { 1 }{ 5 } A src=https://huaweicloudobs.ahjxjy.cn/D155A04470C3F22144EDBAE84C2449DC.png style=vertical-align: middle;/>
②  <img class=jc-formula data-tex=-\frac { 1 }{ 5 } A src=https://huaweicloudobs.ahjxjy.cn/3E3227C8E57C1E12410B2A1FC196C5EF.png style=vertical-align: middle;/>
③  <img class=jc-formula data-tex=-\frac { 1 }{ 2 } A src=https://huaweicloudobs.ahjxjy.cn/D4EB575B114A522583E51E1C299B82B6.png style=white-space: normal; vertical-align: middle;/>
④  <img class=jc-formula data-tex=\frac { 1 }{ 2 } A src=https://huaweicloudobs.ahjxjy.cn/69E76291ADEC71D15FE02C0FB15E7660.png style=vertical-align: middle;/>
【单选题】 已知<img class=jc-formula data-tex=n src=https://huaweicloudobs.ahjxjy.cn/6593C84B94B8062EB35F270378D7D9B6.png style=vertical-align: middle;/>阶矩阵<img class=jc-formula data-tex=A, src=https://huaweicloudobs.ahjxjy.cn/5A79F9EC526E0C33CC320B9CFD03BD2C.png style=vertical-align: middle;/>则<img class=jc-formula data-tex=R(A)=n src=https://huaweicloudobs.ahjxjy.cn/1E513F3E976CAD5E8D5ACEEE51943C73.png style=vertical-align: middle;/>的充要条件是<img class=jc-formula data-tex=(A+B)(A-B)={ A }^{ 2 }-{ B }^{ 2 } src=https://huaweicloudobs.ahjxjy.cn/B3AE6C9467A5CA05232F0CC60E696AFF.png style=vertical-align: middle;/>
①  <img class=jc-formula data-tex=\left| A \right| =0 src=https://huaweicloudobs.ahjxjy.cn/C0FF5500641DFC6CB166CD5F7867609E.png style=white-space: normal; vertical-align: middle;/>
②  <img class=jc-formula data-tex=\left| A \right| \neq 0 src=https://huaweicloudobs.ahjxjy.cn/DDF5A5E8A4C1CB242AB871222A74D4F9.png style=vertical-align: middle;/>
③  不确定
【单选题】 设前提: p<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D50FEE5510C853C83F78D440017D8E6B.png data-tex=\wedge /><img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />q <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto /> r, p, q <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto /> s, <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />s. 则下面哪个不是其有效结论:
①  r
②  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />q.
③  q<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto />p
④  q
【单选题】 设前提: p<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto />q, <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg /> (q<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D50FEE5510C853C83F78D440017D8E6B.png data-tex=\wedge />r), r. 则下面哪个不是其有效结论:
①  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />p
②  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />q.
③  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />q<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/7BA9C8923F2F9C5684519175C6A722C4.png data-tex=\vee /><img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />r
④  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />q<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D50FEE5510C853C83F78D440017D8E6B.png data-tex=\wedge /><img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />r
【单选题】 已知<img class=jc-formula data-tex=f^{ \prime }\left( { e }^{ x } \right) =x{ e }^{ -x } src=https://huaweicloudobs.ahjxjy.cn/A2D866EF9B5FBA9665A83096D0820160.png style=vertical-align: middle;/>,且<img class=jc-formula data-tex=f\left( 1 \right) =0 src=https://huaweicloudobs.ahjxjy.cn/8BC981E4AD6049DFBA17D01C5FB4B736.png style=vertical-align: middle;/>,则<img class=jc-formula data-tex=f\left( x \right)= src=https://huaweicloudobs.ahjxjy.cn/E5E52C6F5B52EE1A248B89A09EC905E4.png style=vertical-align: middle;/>( )
①  <img class=jc-formula data-tex={ e }^{ x } src=https://huaweicloudobs.ahjxjy.cn/00FC70E398ABF6B185393D92CDA0D7CF.png style=vertical-align: middle;/>
②  <img class=jc-formula data-tex=\ln { x } src=https://huaweicloudobs.ahjxjy.cn/BADB4AEBC55B8DCE12993FC806ECF668.png style=vertical-align: middle;/>
③  <img class=jc-formula data-tex={ (\ln { x) } }^{ 2 } src=https://huaweicloudobs.ahjxjy.cn/395F2A3C69CCBAB7F79F9B36E0131FCC.png style=vertical-align: middle;/>
④  <img class=jc-formula data-tex=\frac { 1 }{ 2 } { (\ln { x) } }^{ 2 } src=https://huaweicloudobs.ahjxjy.cn/E2174913DF2DD84E322B672A8C02A70A.png style=vertical-align: middle;/>
【单选题】 公式“(p<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D50FEE5510C853C83F78D440017D8E6B.png data-tex=\wedge />q) <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/7BA9C8923F2F9C5684519175C6A722C4.png data-tex=\vee /> (<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />p<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/7BA9C8923F2F9C5684519175C6A722C4.png data-tex=\vee />r)”的主合取范式为:
①  M0.
②  M4
③  M6
④  M0<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D50FEE5510C853C83F78D440017D8E6B.png data-tex=\wedge />M4<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D50FEE5510C853C83F78D440017D8E6B.png data-tex=\wedge />M6.
【单选题】 设前提: p<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto /><img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />q, <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />r<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/7BA9C8923F2F9C5684519175C6A722C4.png data-tex=\vee />q, r<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D50FEE5510C853C83F78D440017D8E6B.png data-tex=\wedge /><img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />s. 则下面哪个不是其有效结论:
①  q
②  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />p.
③  <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/09825764C15E56B1CFE3099F64BC5193.png data-tex=\neg />q
④  p<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/F388E7EE9892B38FECEEB653227F230A.png data-tex=\mapsto />q
随机题目
【单选题】 设函数<imgwidth="46"height="26"v:shapes="_x0000_i1097"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image090.png">,方程组<imgwidth="166"height="58"v:shapes="_x0000_i1098"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image092.png">的基础解系中含有1个向量,则必有()
①  <imgwidth="122"height="58"v:shapes="_x0000_i1099"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image094.png">
②  <imgwidth="98"height="52"v:shapes="_x0000_i1100"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image096.png">
③  <imgwidth="86"height="26"v:shapes="_x0000_i1101"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image098.png">
④  <imgwidth="58"height="26"v:shapes="_x0000_i1102"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image100.png">与<imgwidth="62"height="26"v:shapes="_x0000_i1103"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image102.png">不成比例
【单选题】 <imgwidth="505"height="29"v:shapes="图片_x0020_84"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image091.png">
①  <imgwidth="52"height="30"v:shapes="图片_x0020_85"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image092.png">
②  <imgwidth="67"height="34"v:shapes="图片_x0020_86"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image093.png">
③  <imgwidth="132"height="30"v:shapes="图片_x0020_87"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image094.png">
④  <imgwidth="56"height="31"v:shapes="图片_x0020_88"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image095.png">
【单选题】 <imgwidth="577"height="30"v:shapes="图片_x0020_99"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image106.png">
①  全不非负
②  不全为零
③  全不为零
④  全大于零
【单选题】 独立方程<imgwidth="150"height="58"v:shapes="_x0000_i1118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image114.png">则基础解系为()
①  <imgwidth="68"height="154"v:shapes="_x0000_i1119"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image116.png">
②  <imgwidth="82"height="154"v:shapes="_x0000_i1120"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image118.png">
③  <imgwidth="82"height="154"v:shapes="_x0000_i1121"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image120.png">
④  <imgwidth="68"height="154"v:shapes="_x0000_i1122"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds04.files/image122.png">
【单选题】 <imgwidth="409"height="37"v:shapes="图片_x0020_36"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image035.png">
①  <imgwidth="42"height="33"v:shapes="图片_x0020_37"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image036.png">
②  <imgwidth="49"height="43"v:shapes="图片_x0020_38"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image037.png">
③  <imgwidth="51"height="32"v:shapes="图片_x0020_39"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image038.png">
④  <imgwidth="81"height="38"v:shapes="图片_x0020_40"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image039.png">
【单选题】 设向量组<imgwidth="126"height="28"v:shapes="_x0000_i1113"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image136.png">的秩为<imgwidth="14"height="14"v:shapes="_x0000_i1114"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image138.png">,且<imgwidth="46"height="16"v:shapes="_x0000_i1115"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image140.png">,则以下结论中正确的是()
①  <imgwidth="26"height="28"v:shapes="_x0000_i1116"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">中必有<imgwidth="14"height="14"v:shapes="_x0000_i1117"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image138.png">个向量线性无关,且<imgwidth="26"height="28"v:shapes="_x0000_i1118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">中任意<imgwidth="36"height="18"v:shapes="_x0000_i1119"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image142.png">个向量都线性相关
②  <imgwidth="26"height="28"v:shapes="_x0000_i1120"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">中任意<imgwidth="14"height="14"v:shapes="_x0000_i1121"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image138.png">个向量都线性相关
③  <imgwidth="26"height="28"v:shapes="_x0000_i1122"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">中任意<imgwidth="14"height="14"v:shapes="_x0000_i1123"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image138.png">个向量都是<imgwidth="26"height="28"v:shapes="_x0000_i1124"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image126.png">的最大无关组
④  <imgwidth="26"height="28"v:shapes="_x0000_i1125"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image143.png">中任意一个向量都可由该组中其他任意<imgwidth="14"height="14"v:shapes="_x0000_i1126"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds03.files/image144.png">个向量线性表示
【单选题】 <imgwidth="487"height="37"v:shapes="图片_x0020_162"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds02.files/image168.png">
①  0
②  1
③  2
④  3
【单选题】 <imgwidth="254"height="27"v:shapes="图片_x0020_196"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image195.png">
①  <imgwidth="67"height="32"v:shapes="图片_x0020_197"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image196.png">
②  <imgwidth="19"height="22"v:shapes="图片_x0020_198"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image197.png">
③  <imgwidth="84"height="36"v:shapes="图片_x0020_199"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image198.png">
④  <imgwidth="97"height="34"v:shapes="图片_x0020_200"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image199.png">
【单选题】 <imgwidth="234"height="33"v:shapes="图片_x0020_116"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image114.png">
①  <imgwidth="237"height="34"v:shapes="图片_x0020_117"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image115.png">
②  <imgwidth="66"height="25"v:shapes="图片_x0020_118"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image116.png">
③  <imgwidth="249"height="21"v:shapes="图片_x0020_119"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image117.png">
④  <imgwidth="201"height="27"v:shapes="图片_x0020_120"src="http://wljy.whut.edu.cn/uploadfiles/word/xxds01.files/image118.png">
【单选题】 <imgwidth="538"height="87"v:shapes="图片_x0020_1"src="http://wljy.whut.edu.cn/uploadfiles/word/xxdsb07.files/image244.jpg">
①  0
②  1
③  0.3
④  0.6