题目内容

二维向量空间为

A. 数轴
B. 空间
C. 平面
D. 无几何意义

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They won’t let their teacher _______ in that way.

A. to be treated
B. treated
C. being treated
D. be treated

矩阵的初等变换包括

A. 初等行变换
B. 初等列变换
C. 数乘
D. A和B

John, you must get your room ________ after breakfast.

A. to be cleaned
B. to clean
C. cleaning
D. cleaned

旋转变换、投影变换、和伸压变换都是线性变换

A. 对
B. 错