如图，属于（）。<img src="20190810/1565429268224710.jpg" title="1565429268224710.jpg" alt="无标题.jpg"/>

【单选题】

① 控制附件

② 配水附件

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【单选题】

如图，属于哪种类型散热器。（）<img src="20190810/1565430991125857.jpg" title="1565430991125857.jpg" alt="图片2.jpg"/>

① 柱型散热器

② 长翼型

③ 圆翼型

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【单选题】

① <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/12445F64870BD00D8C74DBBBE1731C4A.png data-tex={ Z }_{ in }=(50+j59.5)\Omega />

② <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/4F9EF917ABC7A09563BDFAE981B053B8.png data-tex={ Z }_{ in }=(40+j59.5)\Omega />

③ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D076A9B76E99B691C9714A6969DA7263.png data-tex={ Z }_{ in }=(50+j40)\Omega />

④ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/DF95332010C4D1231979A33E9DC16704.png data-tex={ Z }_{ in }=(50-j59.5)\Omega />

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① u<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/A61758EB2BFA56FBDC2CD01AAE14098A.png data-tex=u=90\sqrt { 2 } sin(314t-{ 8.7 }^{ 0 })V/>

② <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/5D0D1204DE0E549B99F93C6F4AB03E93.png data-tex=u=64\sqrt { 2 } sin(314t-{ 8.7 }^{ 0 })V/>

③ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/058C7EE5BFE4A559626CC50BACBD52EB.png data-tex=u=64\sqrt { 2 } sin(50t-{ 8.7 }^{ 0 })V/>

④ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/CEA2F282D0CAB1DE63C7939C72ED6695.png data-tex=u=64\sqrt { 2 } sin(314t-{30}^{ 0 })V/>

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【单选题】

① <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/5F931CE6FE3F3703B2BFEF357DAD2B21.png data-tex=I=2.24A,{ U }_{ ab }=20V,\hat { S } =(20-j40)VA/>

② <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/DB777B73C24D41B286D5E026FC00C8D6.png data-tex=I=2.24A,{ U }_{ ab }=20V,\hat { S } =(20+j40)VA/>

③ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/819522447EA95D8DB3A83DC72EC3A361.png data-tex=I=2.24A,{ U }_{ ab }=20V,\hat { S } =(40-j20)VA/>

④ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D9CE7A72F664633AC68008A7A39F9B30.png data-tex=I=2.24A,{ U }_{ ab }=20V,\hat { S } =(40+j20)VA/>

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【单选题】

① U=<img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/6A43875296E96D82DD9C7F8B49F073F6.png data-tex=U=311V\quad ,\quad \varphi ={ 30 }^{ 0 }\quad ,\quad f=50Hz\quad ,\quad T=0.02s/>

② <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/663CC69DAF02F253B0F28D246F4B581A.png data-tex=U=220V\quad ,\quad \varphi ={ 30 }^{ 0 }\quad ,\quad f=50Hz\quad ,\quad T=0.02s/>

③ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/DE2EF4673D0C1D771A6D98DB66C48AE1.png data-tex=U=220V\quad ,\quad \varphi ={ 30 }^{ 0 }\quad ,\quad f=314Hz\quad ,\quad T=0.02s/>

④ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/5682E00D63ADB8357EC4F633D27AEE8C.png data-tex=U=220V\quad ,\quad \varphi ={ 30 }^{ 0 }\quad ,\quad f=50Hz\quad ,\quad T=314s/>

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【单选题】

① <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/47B6A2CAB0FB3169C091C0DD95BD9C76.png data-tex={ i }_{ 1 }=6.74\sqrt { 2 } sin(314t+{ 47.6 }^{ 0 })A\quad \\ \quad { i }_{ 2 }=67.4\sqrt { 2 } sin(314t+{ 47.6 }^{ 0 })A\quad \\ \quad { u }_{ 2 }=2.1\sqrt { 2 } sin(314t+{ 47.6 }^{ 0 })V/>

② <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/D7322B6290F75C65E60F173FF2DE7209.png data-tex={ i }_{ 1 }=6.74sin(314t+{ 47.6 }^{ 0 })A\quad \\ \quad { i }_{ 2 }=67.4sin(314t+{ 47.6 }^{ 0 })A\quad \\ \quad { u }_{ 2 }=2.1sin(314t+{ 47.6 }^{ 0 })V/>

③ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/5D9278CB3B1F41ECEA0BBD5364925DB1.png data-tex={ i }_{ 1 }=6.74\sqrt { 2 } sin(50t+{ 47.6 }^{ 0 })A\quad \\ \quad { i }_{ 2 }=67.4\sqrt { 2 } sin(50t+{ 47.6 }^{ 0 })A\quad \\ \quad { u }_{ 2 }=2.1\sqrt { 2 } sin(50t+{ 47.6 }^{ 0 })V/>

④ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/FE7BE4B6478D54C2EC3A8769D0E689EF.png data-tex={ i }_{ 1 }=6.74\sqrt { 2 } sin(314t+{ 25 }^{ 0 })A\quad \\ \quad { i }_{ 2 }=67.4\sqrt { 2 } sin(314t+{ 25 }^{ 0 })A\quad \\ \quad { u }_{ 2 }=2.1\sqrt { 2 } sin(314t+{ 25 }^{ 0 })V/>

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【单选题】

① <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/A69A8A8E03B543F42881BE1FECF1D22F.png data-tex=I=14.14mA,i=20sin(1000t+{ 45 }^{ 0 })mA/>

② <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/61A79C8AA26A0B2C1204D4815BE900D6.png data-tex=I=14.14mA,i=20sin(1000t-{ 45 }^{ 0 })mA/>

③ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/76C2FE44ED64E707C4F6D00421095DAE.png data-tex=I=20mA.i=20sin(1000t+{ 45 }^{ 0 })mA/>

④ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/C45DCC8EC5DFF29788D659A0E3D310BC.png data-tex=I=14.14mA,i=14.14sin(1000t+{ 45 }^{ 0 })mA/>

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【单选题】

① <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/FB38101755F6639BFA659D3FB3CF79C6.png data-tex=\dot { { U }_{ C } } =32.36\angle { -63.45 }^{ 0 }V,\dot { { I }_{ 1 } } =5\angle { 53.1 }^{ 0 }A,\dot { { I }_{ 2 } } =-5\sqrt { 2 } \angle { 8.1 }^{ 0 }A/>

② <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/997F0847A50E523E1C43446F8F6079F4.png data-tex=\dot { { U }_{ C } } =22.36\angle { -63.45 }^{ 0 }V,\dot { { I }_{ 1 } } =5\angle { 53.1 }^{ 0 }A,\dot { { I }_{ 2 } } =-5\sqrt { 2 } \angle { 8.1 }^{ 0 }A/>

③ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/A26AF8F81872B46D6313DE5F93927958.png data-tex=\dot { { U }_{ C } } =22.36\angle { -63.45 }^{ 0 }V,\dot { { I }_{ 1 } } =10\angle { 53.1 }^{ 0 }A,\dot { { I }_{ 2 } } =-5\sqrt { 2 } \angle { 8.1 }^{ 0 }A/>

④ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/36937C21B93804AEE99D477F4248F1D1.png data-tex=\dot { { U }_{ C } } =22.36\angle { -63.45 }^{ 0 }V,\dot { { I }_{ 1 } } =5\angle { 53.1 }^{ 0 }A,\dot { { I }_{ 2 } } =-10\sqrt { 2 } \angle { 8.1 }^{ 0 }A/>

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【单选题】

① <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/96549CE1F66A72FC71857F65B2064550.png data-tex=\dot { { U }_{ C } } =22.36\angle { -63.45 }^{ 0 }V\quad ,\quad \dot { { I }_{ 1 } } =5\angle { 53.1 }^{ 0 }A\quad ,\quad \quad \dot { { I }_{ 2 } } =-5\sqrt { 2 } \angle { 8.1 }^{ 0 }A/>

② <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/33EF9120DD52B1802F531C0B0427B092.png data-tex=\dot { { U }_{ C } } =22.36\angle { -63.45 }^{ 0 }V\quad ,\quad \dot { { I }_{ 1 } } =-5\angle { 53.1 }^{ 0 }A\quad ,\quad \quad \dot { { I }_{ 2 } } =-5\sqrt { 2 } \angle { 8.1 }^{ 0 }A/>

③ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/66E63DC73B03D3683D6E649DBD0F4DEC.png data-tex=\dot { { U }_{ C } } =22.36\angle { -63.45 }^{ 0 }V\quad ,\quad \dot { { I }_{ 1 } } =5\angle { 53.1 }^{ 0 }A\quad ,\quad \quad \dot { { I }_{ 2 } } =5\sqrt { 2 } \angle { 8.1 }^{ 0 }A/>

④ <img class=jc-formula style=vertical-align: middle; src=https://huaweicloudobs.ahjxjy.cn/1B0CC7824E4E369D6B1848814659A0AC.png data-tex=\dot { { U }_{ C } } =22.36\angle { -63.45 }^{ 0 }V\quad ,\quad \dot { { I }_{ 1 } } =5\sqrt { 2 } \angle { 53.1 }^{ 0 }A\quad ,\quad \quad \dot { { I }_{ 2 } } =-5\angle { 8.1 }^{ 0 }A/>

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