答案：
第1空:
答案：
第1空:
B.
是齐次线性方程组AX=0的解,则( )一定也是AX=0的解
A. INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/692f9fd4dfd71709e724a1a848ac08b3.png" ＼* MERGEFORMATINET 
B. INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/50770833d22f060e7239d5c5ad2abfcb.png" ＼* MERGEFORMATINET 
C. INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/e5757f1f8d9f69ca161ce967e93f2d4a.png" ＼* MERGEFORMATINET 
D. INCLUDEPICTURE ＼d "https://p.ananas.chaoxing.com/star3/origin/784cfc65930f1ace82cd31c28b60ddbf.png" ＼* MERGEFORMATINET 
矩阵,齐次线性方程组 INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/181683" ＼* MERGEFORMATINET 
仅有零解的充要条件是 INCLUDEPICTURE ＼d "http://mooc1-2.chaoxing.com/ananas/latex/p/53238" ＼* MERGEFORMATINET 
A. 小于m
B. 小于n
C. 等于m
D. 等于n
对称变换矩阵为( )
A. INCLUDEPICTURE ＼d "http://p.ananas.chaoxing.com/star3/origin/7e1585aa592a8de16805f878d5153121.png" ＼* MERGEFORMATINET 
B. INCLUDEPICTURE ＼d "http://p.ananas.chaoxing.com/star3/origin/7b623f917684ab115358a8d6fcdf37fd.png" ＼* MERGEFORMATINET 
C. INCLUDEPICTURE ＼d "http://p.ananas.chaoxing.com/star3/origin/7b623f917684ab115358a8d6fcdf37fd.png" ＼* MERGEFORMATINET 
D. INCLUDEPICTURE ＼d "http://p.ananas.chaoxing.com/star3/origin/a95621bb03c98c3bd7f7d9da32de5c7b.png" ＼* MERGEFORMATINET 
表示下列哪个关系A. 前n个奇数之和
B. 前n个偶数之和
C. 前n个正整数之和
D. n的阶乘
A. z=ABx
B. z=BAx
C. x=ABz
D. x=BAz
A. 无向图
B. 有向图
C. 完全图
D. 偶图
