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问题 单项选择题

关于共轭采集与飞焦点采集的叙述，错误的是

A．共轭采集重建是在扫描时快速地改变探测器的位置
B．共轭采集重建是在扫描时分别采集180°和360°的扫描数据
C．共轭采集不能提高扫描图像的纵向分辨力
D．飞焦点采集重建是在扫描时使焦点在两个点之间快速变换，得到双倍的采样数据并重建图像
E．飞焦点采集可提高扫描图像的纵向分辨力

答案

参考答案：C

解析： 共轭采集和飞焦点采集都可提高扫描图像的纵向分辨力。

单项选择题

A young man was going to join the army (军队) and had to (41) a medical examination. The doctor was sitting at a desk when he came in. He said to the man, "Take your coat and shirt off and (42) on that chair.
The young man did so. The doctor looked at him for a moment without (43) up from his chair and then said, "All right. Put your clothes on again.
"But you haven’t examined me at ail!" the young man said in (44) .
"There is no need to do so," the doctor said with a (45) .
"When I (46) you to take your coat and shirt off, you heard me all right, so there is nothing wrong with your (47) . You saw the chair, so your eyes are (48) . You could take your clothes off and sit on the chair, so you must be in good health. And you understand what I told you to do and did it without a (49) , so you (50) healthy enough for the army.\

[A] question [B] mistake [C] matter
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写句子

按要求改写句子。

1．瓢泼一样的大雨把两岸的火把都浇灭了。（改为“被”字句）

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2．后人对孔子十分尊敬。（改为感叹句）

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3．我们走了许久，远远地望见了一条河。（改为比喻句）

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4．树上的小鸟叽叽喳喳地叫着。（改为拟人句）

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