60、互联网可以用( )来描述,其中结点表示网页,边表示网页间的链接。
(1.0)
A. 无向图
B. 有向图
C. 完全图
D. 偶图
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39、 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/9ecd647a4040ae072d35b0075d98c9d8.png" \* MERGEFORMATINET
(1.0)
https://www.shititong.cn/cha-kan/shiti/0005b877-74f2-55b8-c0ce-60519723ce00.html
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32、下面向量组线性相关的是( )
(1.0)
A. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/4a3b4689d2c84779343fc2a10647fbd6.png" \* MERGEFORMATINET
B. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/d7e168e83816252cc415166f87657892.png" \* MERGEFORMATINET
C. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/1852265184afaae6995bd2595e70e4e0.png" \* MERGEFORMATINET
D. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/eb6f196da817439e0f1bd6460fdbf0a3.png" \* MERGEFORMATINET
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71、根据历年气象统计资料,某地四月份吹东风的概率为9/30,下雨的概率为11/30,既吹东风又下雨的概率为8/30.则在吹东风的条件下下雨的概率为( )
(1.0)
A. 9/11
B. 8/11
C. 2/5
D. 8/9
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8/25
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18、 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/cff312e9958b2e5f345a654f2f913a78.png" \* MERGEFORMATINET
展开式种 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/1680a5a303521eb32b18d65f8facd0f6.png" \* MERGEFORMATINET
项的系数为_________( )
( )
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6
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73、据既往经验,注射破伤风抗毒素异常发生率为5‰,某医院一年接种600人次,无1例发生异常,该情况发生的可能性P(X=0)应等于 ( )。
(1.0)
A. INCLUDEPICTURE \d "http://mooc1-api.chaoxing.com/ananas/latex/p/887682" \* MERGEFORMATINET
B. INCLUDEPICTURE \d "http://mooc1-api.chaoxing.com/ananas/latex/p/887683" \* MERGEFORMATINET
C. 0/600
D. 1- INCLUDEPICTURE \d "http://mooc1-api.chaoxing.com/ananas/latex/p/887683" \* MERGEFORMATINET
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52、设三阶方阵A的特征值分别为2,-3,-1,下列各式中不成立的是
(1.0)
A. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/527a848681db7a61e567cbd9069df5df.png" \* MERGEFORMATINET
B. Ax=-3x
C. Ax=-x
D. Ax=x
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22、向量 INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/73357b760f571c259794ef21e9f7b9ef.png" \* MERGEFORMATINET
先逆时针旋转 INCLUDEPICTURE \d "http://mooc1-api.chaoxing.com/ananas/latex/p/29250" \* MERGEFORMATINET
,再顺时针旋转 INCLUDEPICTURE \d "http://mooc1-api.chaoxing.com/ananas/latex/p/463231" \* MERGEFORMATINET
得到的向量为( )
(1.0)
A. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/73357b760f571c259794ef21e9f7b9ef.png" \* MERGEFORMATINET
B. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/6d0b6e9f4255e23716df5adbbacccc7b.png" \* MERGEFORMATINET
C. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/62e4261dfaa7c90b847194de5d1bc7eb.png" \* MERGEFORMATINET
D. INCLUDEPICTURE \d "https://p.ananas.chaoxing.com/star3/origin/e749a2c6979ee62ee10ddca7dfe12ba9.png" \* MERGEFORMATINET
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