下列关于齐次线性方程组AX=O的说法错误的是（ ）
A. 一定有解
B. 有可能无解
C. 若r(A)=n,则该方程组仅有零解，其中n为未知量的个数
D. 若r(A)
查看答案
如果某线性方程组存在两个不同的解，则其定有无穷解。
A. 对
B. 错
已知某齐次线性方程组只有一个解，则该解一定是零解。
A. 对
B. 错
[音频]Questions 1 and 2 are based on the news report you have just heard.
A. It was held in Las Vegas.
B. It had a large collection of modern computers.
C. Vivint is a smart home service provider.
D. It was said to be the largest collection of new electronic devices in the States.
2
A. The devices might be very expensive.
B. The devices might be stolen when they are not at home.
C. The devices might be hacked and used by someone else.
D. The devices can’t be used when they are far away from home.
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