题目内容

DR平板探测器属于

A. X线发生单元
B. X线采集单元
C. 床、X线管支架单元
D. 信息处理单元
E. 图像显示单元

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She did nothing _______ at the photo.

A. except look
B. but to look
C. except to look
D. but looking

I asked him to _______ me a few minutes so that we could go over all the problems.

A. spend
B. spare
C. save
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二维向量空间为

A. 数轴
B. 空间
C. 平面
D. 无几何意义

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

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