关于影响计算机X线摄影影像质量的因素说法错误的是() A.读出装置激光点直径越小,图

题型:单项选择题 A1/A2型题

问题:

关于影响计算机X线摄影影像质量的因素说法错误的是()

A.读出装置激光点直径越小,图像质量越好

B.影像板以及光电倍增管都会产生噪声,影响图像质量

C.数字转换会产生相应的量化噪声和伪影

D.散射线,会使计算机摄影图像的清晰度提高

E.信号的数字化,会使图像的空间分辨率下降

考点:放射医学技术(士)医学影像设备医学影像设备题库
题型:单项选择题 A1/A2型题

补全对话

根据对话内容, 从对话后的选项中选出能填入空白处的最佳选项.选项中有两项多余选项。

(Jerry is at a hotel in Xi'an. He is talking to a clerk.)

Clerk:  What can I do for you,  sir?

Jerry:  __1__

Clerk:  At what time?

Jerry:  __2__

Clerk:  We have a computer wakeup service. __3_ That is to say,  dial 2 and then 0615 for the time.

Jerry:  I see. Then it is 20615. Thank you. __4__

Clerk:  Just dial your new wakeup time. The computer will record the new wakeup time.

Jerry:  If I dial 20700,  I will be waken up at 7: 00 a.m. Am I right?

Clerk:  __5__

Jerry:  Thank you. Good night.

A.Yes,  that's right.

B. 6: 15 a.m.,  please.

C. I'd like a room for two days.

D. Please dial us for the service.

E. Please dial 2 for the service first and then the time.

F. By the way,  if I want to change my wakeup time,  what shall I do?

G. I'm Jerry in Room 528,  and I want a wakeup call tomorrow morning.

题型:单项选择题 A1/A2型题

一个底面半径是1分米,高6分米的圆柱形木料沿其底面直径切成相等的两块,表面积增加了多少?

题型:单项选择题 A1/A2型题

You should try to get a good night's sleep  ____ much work you have to do.      [ ]

A. however          

B. no matter      

C. although          

D. whatever

题型:单项选择题 A1/A2型题

ADSL可以传输很长的距离,而且其速率与距离没有关系。

题型:单项选择题 A1/A2型题

子氢在钢材内部的微裂缝、空隙中生成氢分子,其体积膨胀()左右。

A.20倍

B.2倍

C.10倍

D.50倍

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