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【单选题】
P、Q平面的水平投影应标记为( )。<img src=https://huaweicloudobs.ahjxjy.cn/F2AABBA0431B209EC3B47E0938D54BEA.png title=图片1.png alt=图片1.png style=width: 306px; height: 201px; width=306 height=201/>

p’、q’
p、q
p”、q”
P、Q
【单选题】
P、Q平面的正面投影应标记为( )。<img src=https://huaweicloudobs.ahjxjy.cn/F2AABBA0431B209EC3B47E0938D54BEA.png title=图片1.png alt=图片1.png style=width: 302px; height: 192px; width=302 height=192/>

p’、q’
p、q
p”、q”
P、Q
【单选题】
平面Q水平投影具有积聚性,因此称之为( )。<img src=https://huaweicloudobs.ahjxjy.cn/52410CDCBD2E838170348A6DD9876195.png title=图片4.png alt=图片4.png style=width: 340px; height: 219px; width=340 height=219/>

铅垂面
侧平面
侧垂面
一般位置平面
【单选题】
图中C2含义指45度倒角( )为2。<img src=https://huaweicloudobs.ahjxjy.cn/9E62863FFFE6B0B300A3D397A86163F1.png title=图片10.png alt=图片10.png style=width: 388px; height: 266px; width=388 height=266/>

直角边长度
直角斜边
倒角半径
倒角直径
【单选题】
设A,B为两随机事件,且A<img class=jc-formula data-tex=\supset src=https://huaweicloudobs.ahjxjy.cn/37A4B3C430EFA04CF480D02C0DFECE89.png style=vertical-align: middle; width: 20px; height: 17px; width=20 height=17/>B,则下列式子正确

P(A<img class=jc-formula data-tex=\cup src=https://huaweicloudobs.ahjxjy.cn/9BD598E68F21E65385221B2250659C3A.png style=vertical-align: middle; width: 22px; height: 14px; width=22 height=14/>B) = P(A)
P(AB)=P(A)<img width=99 height=21 src=http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif word_img=file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image002.gif style=background:url(http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd/>
P(B|A)=P(B)
P(B-A)=P(B)-P(A)<img width=76 height=21 src=http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif word_img=file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image002.gif style=background:url(http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd/><img width=83 height=21 src=http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif word_img=file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image004.gif style=background:url(http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd/><img width=76 height=21 src=http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif word_img=file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image002.gif style=background:url(http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd/><img width=83 height=21 src=http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif word_img=file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image004.gif style=background:url(http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd/><img width=76 height=21 src=http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif word_img=file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image002.gif style=background:url(http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd/><img width=83 height=21 src=http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif word_img=file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image004.gif style=background:url(http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd/><img width=76 height=21 src=http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif word_img=file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image002.gif style=background:url(http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd/><img width=83 height=21 src=http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif word_img=file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image004.gif style=background:url(http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd/><img width=76 height=21 src=http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif word_img=file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image002.gif style=background:url(http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd/><img width=83 height=21 src=http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/spacer.gif word_img=file:///C:/Users/ADMINI~1/AppData/Local/Temp/msohtmlclip1/01/clip_image004.gif style=background:url(http://www.ahjxjy.cn/design/html/js/vender/ueditor/themes/default/images/word.gif) no-repeat center center;border:1px solid #ddd/>
【单选题】
<img src=https://huaweicloudobs.ahjxjy.cn/B02CD22D3347799C04123AFB12CAB4BB.png title=题干.png alt=题干.png width=718 height=64 style=width: 718px; height: 64px;/>

<img src=https://huaweicloudobs.ahjxjy.cn/295E5C45CDB9BAA827198FAF8E044AD8.png style= title=2.png/>
<img src=https://huaweicloudobs.ahjxjy.cn/F9CC7E6795E49482C881A3E135957501.png title=3.png style=white-space: normal;/>
<img src=https://huaweicloudobs.ahjxjy.cn/C9002CED13BF33495DC6181927AFF047.png title=1.png style=white-space: normal;/>
<img src=https://huaweicloudobs.ahjxjy.cn/5A3C180AB3D7B03217D519B4EB7D7F23.png title=4.png style=white-space: normal;/>
【单选题】
下列程序输出结果()。 #include fun(int *a,int *b) {int *w;*a=*a+*a;*w=*a; *a=*b; *b=*w;} main( ) {int x=9,y=5,*px=fun(px,py);printf(%d, %d\n,x,y);}

出错
18,5
5,9
5,18
【单选题】
直线AB侧面投影具有积聚性,因此称之为( )。<img src=https://huaweicloudobs.ahjxjy.cn/5C4788722533E00B45A96C646B2D4E17.png title=图片3.png alt=图片3.png style=width: 399px; height: 247px; width=399 height=247/>

一般位置直线或倾斜线
侧垂线
正平线
水平线
【单选题】
直线CD水平投影面具有积聚性,因此称之为( )。<img src=https://huaweicloudobs.ahjxjy.cn/5C4788722533E00B45A96C646B2D4E17.png title=图片3.png alt=图片3.png style=width: 364px; height: 226px; width=364 height=226/>

正平线
铅垂线
侧垂线
侧平线
【多选题】
关于正态分布<img class=jc-formula data-tex=N(\mu ,{ \sigma }^{ 2 }) src=https://huaweicloudobs.ahjxjy.cn/CAA65D1EC6C1DBEDB20A490E6E422BA0.png style=vertical-align: middle; width: 77px; height: 29px; width=77 height=29/>,下列正确

<img class=jc-formula data-tex=P(X\le \mu )=\frac { 1 }{ 2 } src=https://huaweicloudobs.ahjxjy.cn/8D0D906A45C5F856FBB82E3CC91F2BA4.png style=vertical-align: middle;/>
<img class=jc-formula data-tex=\frac { X-\mu }{ \sigma } \~ N(0,1) src=https://huaweicloudobs.ahjxjy.cn/68E9F7BE2936505CACBBA73F433FFC91.png style=vertical-align: middle;/>
<img class=jc-formula data-tex=\mu 一定时,\sigma 越小,其概率密度函数图形越陡。 src=https://huaweicloudobs.ahjxjy.cn/9303FE8C0038493E66620B7961A939B3.png style=vertical-align: middle;/>
<img class=jc-formula data-tex=\mu 一定时,\sigma 越大,其概率密度函数图形越陡。 src=https://huaweicloudobs.ahjxjy.cn/B19ACA96F69602C3A83F1FD22048D322.png style=vertical-align: middle;/>