关于CT噪声的叙述,正确的是() A.噪声的大小与扫描层厚有关 B.CT的图像质量与

题型:单项选择题

问题:

关于CT噪声的叙述,正确的是()

A.噪声的大小与扫描层厚有关

B.CT的图像质量与噪声无关

C.噪声不受X线照射剂量的影响

D.噪声与激光胶片上的曝光量有关

E.噪声是一种外界干扰因素

考点:放射医学技术(师)CT成像理论CT成像理论题库
题型:单项选择题
请阅读下面短文,掌握其意思,然后从方框中所给方的词中选出最恰当的10个,用适当形式填空。(每小题1分,共10分)
healthy, what, because, ourselves, speech, teach, to, find, isn’t, scientist, that, so
In America, science is a very important class. In middle school we were __小题1:_ how to solve problems by thinking like a ___小题2:__. We had to think of a question, guess an answer, and ___小题3:__ a way to test our guess. There were lots of experiments and other activities. I remember studying how science can explain things like light and electricity.
Our English class is very different from___小题4:__ in China, more like Chinese class I think! We read lots of books and talked about them, ___小题5:_ we could understand what we read better. We learned how to know what information is important when we read and what ___小题6:_ so important. In my class we all gave six ___小题7:_ to the class during the year. We had to talk in front of the class for six __小题8:ten minutes!
We also have health classes. In this class, we learned about our bodies and how to take care of ___小题9:__ by doing things like eating healthy foods, and not doing ___小题10:__ things like smoking or drugs (毒品). We cooked a little bit, but I was not very good at it!
题型:单项选择题

下列句子中,没有语病的一项是                                      

A.彼得堡接近北极圈,由于每天晚上十二点钟太阳还在天上,使我们每天在那里游览时间都能增加好几个小时。

B.就菲美“肩并肩”联合军演而言,菲方大有“项庄舞剑,意在沛公”,搅动南海局势,提升双方在亚太地区的影响力恐怕是美菲双方的契合点。

C.“毒胶囊”再次引发公众恐慌,致使某些人不恰当地服用药物;对此有关部门应及时公开处理结果,尽快消除公众服用胶囊的顾虑和影响。

D.在美国次贷引发的金融危机波及全球的背景下,中国经济正面临着国际国内的诸多挑战,保持经济平稳较快发展已成当前重要任务。

题型:单项选择题

26岁初孕妇,末次月经记不清。自觉2周前开始胎动,检查子宫长度为19cm,比较符合实际的妊娠周数应是()

A.14~16周

B.17~19周

C.20~22周

D.23~25周

E.26~28周

题型:单项选择题

干酪样坏死

题型:单项选择题

青霉素G对()抑杀效果好。

A、革兰氏阳性菌

B、革兰氏阴性杆菌

C、结核分枝杆菌

D、病毒

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