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【判断题】
A正交矩阵的条件为a的列行向量都为单位向量且两两正交。A.
正确
B.
错误
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反馈参考答案：
举一反三
【单选题】Does the man like the job of bioengineer?
A.
Yes, he likes it.
B.
No, he doesn't like it.
【单选题】What does the woman think of the man?
A.
The man nags too much.
B.
The man is a lazy bone.
C.
The man is responsible and caring.
D.
The man spends too much money.
【单选题】一个完整的算法应该具有( )等五个特性。
A.
可执行性、可移植性和可可扩展性
B.
可执行性、确定性和有穷性
C.
确定性、有穷性和稳定性
D.
易读性、稳定性和安全性
【单选题】What (does) Mr. Johnson like? He's a (friendly) sort (of man). I (like) to work with him.
A.
does
B.
friendly
C.
of man
D.
like
【单选题】.John sold the camera yesterday which his brother ________ him as a birthday present from Japan.
A.
has sent
B.
had sent
C.
was sending
D.
would send
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