印版应具有良好的表面平整性,特别是在有效工作面内更应具有如此特征。

题型:判断题

问题:

印版应具有良好的表面平整性,特别是在有效工作面内更应具有如此特征。

考点:电子图像处理工考试中级电子图像处理工中级电子图像处理工题库
题型:判断题

关于SPECT/PET与PET的比较,下列哪些不正确()

A.SPECT/PET与PET均采用符合探测原理

B.SPECT/PET在空气中的分辨率可达4.5mm,与PET接近

C.SPECT/PET兼备单光子和F正电子成像

D.PET只能进行F正电子成像

E.SPECT/PET和PET均能进行快速动态显像

题型:判断题

福州的冬天气温最低可达-2度左右,该温度的正确的写法是______________。读着:_______________。

题型:判断题

E

Organiaing Yourself

Many new students find it hard to do all the study that has to be done; they find themselves putting off reading assignment, jumping from subject to another and rarely being quite certain what they are trying to do during a particular study session. The best way to overcome these difficulties and to start studying efficiently is to plan your time and organize your work. Let us suppose that you have 15 hours per week of classes and that you decide to allow yourself a 40-hour working week (a reasonable figure, leaving you 70 waking hours for other activities).

You now have to decide how to divide the remaining 25 hours of private study. Naturally the decisions you make will change from week to week according to what essays have to be written and what reading has to be done. Many people find it helpful to draw up each week a seven-day timetable showing the occasions on which they will be working privately and the particular subjects that will be studying on each occasion. By checking such a plan at times during the week, you can see what you have done and what you have still to do: the whole plan becomes more manageable. There are a number of places where you can study—college library, public library, home, empty classrooms, on bus or train—and each has several obvious advantages and disadvantages. The college library is least busy in the evening, on Wednesday afternoon, and all day Friday and Saturday.

When you are deciding where to study, keep the following suggestions in mind:

1.Try to study always in the same place. After a while the familiar surroundings will help you to switch into the right frame of mind as soon as you sit down.

2.Find somewhere with as few distractions as possible.

3.Make sure that your study place has a good light and is warm (but not hot ) and well aired.

72.What’s the main idea of this passage?

A.Plan your time and organize your work.      

B.Overcome your difficulties.

C.Be certain what you can do.   

D.Find a quiet place for study.

73.A student’s organization of his work will need to change according to____.

A.how many hours he is awake B.how many subjects are required

C.how many lectures he misses D.what he has to write and read that week

74.A student is advised to make a weekly plan and to check it from time to time in order to  __________.

A.see whether he has calculated it properly     

B.see what day of the week is

C.see what work still needs doing    

D.see how he feels at the whole week

75.Which of the following is NOT mentioned as a place where you can study?

A.The bus      B.The train      C.Home      D.A public house

题型:判断题

螺纹插装阀的作用是:()。

A.发出液压信号,控制摆缸换向

B.主油缸连通腔补油

C.减缓油缸速度,给系统缓冲

D.发出液压信号,控制主油缸换向

题型:判断题

妊娠甲状腺功能亢进症患者最佳的治疗药物是()

A.丙硫氧嘧啶

B.甲苯磺丁脲

C.碘化钠

D.放射性碘

E.β受体阻滞剂

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