79、以A表示事件“甲种产品畅销,乙种产品滞销”,则其对立事件 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/6c633daab7e33d41142bf6962c6f78b1.png" ＼* MERGEFORMATINET 为
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15、设有一个连通网络如图所示。试采用prim算法从顶点0开始构造最小生成树。( )( )

11、 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/fd037810c400155720036a1026e426b2.png" ＼* MERGEFORMATINET
请回答是还是否?
( )

5、矩阵 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/c26b036e12bc370ccac4c6ddc452f430.png" ＼* MERGEFORMATINET ,则 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/e17a3b2ad5a6d579639f5df659fad89a.png" ＼* MERGEFORMATINET
( )

28、设 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/03dc2fa866de121c60079e7c3c0c1ec8.png" ＼* MERGEFORMATINET 为齐次线性方程组 INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/181683" ＼* MERGEFORMATINET 的解, INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/0ec1c289289586c124842686f7b692a5.png" ＼* MERGEFORMATINET 为非齐次线性方程组 INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/23856" ＼* MERGEFORMATINET 的解,则( )
(1.0)

A. 　 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/25940044c519ca9424762cf1dcd641f4.png" ＼* MERGEFORMATINET

B. 　 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/c851e62c6efb84346fa3b8eb559eb305.png" ＼* MERGEFORMATINET

C. 　 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/c7da3295dfca86efa5d5a91715d20ee8.png" ＼* MERGEFORMATINET

D. 　 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/6edb0e5171891a2cea8111d1d377d535.png" ＼* MERGEFORMATINET

2、若关于x,y的二元一次方程组 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/5db0c2da95a3c62a2070d895a03ff2c3.png" ＼* MERGEFORMATINET 有非零解,则m= _______
( )

2
第2空:

7、算法的三种基本结构是
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A. 　 顺序结构、条件结构、循环结构

B. 　 顺序结构、循环结构、模块结构

C. 　 顺序结构、模块结构、条件结构

D. 　 模块结构、条件结构、循环结构

76、 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/be291f800548a923b7f6712185bf462e.png" ＼* MERGEFORMATINET
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A. 　 5/6

B. 　 9/10

C. 　 2/15

D. 　 1/15

41、 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/d34b4ae7649e964b7605f876a775e5df.png" ＼* MERGEFORMATINET
(1.0)

A. 　 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/08dba66232d751ad814a940634adf071.png" ＼* MERGEFORMATINET

B. 　 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/22f7f2467b301d1b86e11ba053cc6c88.png" ＼* MERGEFORMATINET

C. 　 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/acf8af233ff31cbf149e07040894deae.png" ＼* MERGEFORMATINET

D. 　 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/413915a7ff07be914f66fe2c26bdc200.png" ＼* MERGEFORMATINET

23、下列说法不正确的是( )
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A. 　 若干个可逆的n阶矩阵之积可逆,且其逆为这些矩阵的逆按相同顺序的乘积

B. 　 若A可逆,则 INCLUDEPICTURE ＼d "http://mooc1-api.chaoxing.com/ananas/latex/p/34176" ＼* MERGEFORMATINET 的逆就是A本身。

C. 　 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/59948f7de2981a3968f6f48a17b271e7.png" ＼* MERGEFORMATINET

D. 　 若A是3阶矩阵,且方程 INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/51b7a79a8c8b2da9d131cce3a4d20f8f.png" ＼* MERGEFORMATINET 有唯一解,则A可逆