螺旋CT扫描螺距增加，则（） A.探测器接收射线量减少，图像质量

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问题单项选择题

螺旋CT扫描螺距增加，则（）

A.探测器接收射线量减少，图像质量下降

B.探测器接收射线量增加，图像质量提高

C.探测器接收射线量增加，图像质量下降

D.探测器接收射线量减少，图像质量提高

E.探测器接收射线量减少，图像质量不变

答案

参考答案：A

填空题

用所给词的适当形式填空。

1. There are a few _______________ (tomato) in the bowl.

2. _______________ (not run) in the street!

3. Let's _______________ (sit) here and _______________ (watch) TV.

4. The boy is _______________ (put) his books on the bookshelf.

5. The conductor _______________ (check) the tickets just now.

6. You should _______________ (mix) up flour, eggs and water to make bread.

名词解释

平顺护岸