体内照射中心轴上任一深度的吸收剂量率与照射中心轴上参考点的吸收剂量率之比的百分率定义

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问题:

体内照射中心轴上任一深度的吸收剂量率与照射中心轴上参考点的吸收剂量率之比的百分率定义为()

A.PPD

B.TMR

C.TCR

D.PDD

E.TAR

考点:广西住院医师专业实践能力专业实践能力题库
题型:单项选择题

室外低压消防给水系统是指系统管网内平时水压较低,火场上水枪所需的压力,由消防车或其他移动式消防水泵加压产生。一般城镇和居住区多为这种系统。

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在下列反应式中的括号里填上恰当的反应物

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发电厂、变电站母线失电的现象有哪些?

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公安信息的高级发展阶段是( )

A.办公自动化阶段

B.网络设施建设阶段

C.信息资源管理阶段

D.电子警务阶段

题型:单项选择题

There (1) not one type of reading but several according to your reasons for reading. To read carefully, you have to (2) your reading speed and technique (3) your aim (4) reading. Skimming is a technique necessary for quick and efficient reading.

When skimming, you (5) the reading (6) quickly in order to get the (7) of it, to know how it is organized, (8) an idea of the tone or the intention of the writer. Skimming is (9) an activity which (10) an overall view of the text and (11) a definite reading competence.

Skimming doesn’t need reading all the material, but it doesn’t mean that it is an (12) skill for the lazy, because it need a high degree of alertness and concentration.

When you read, you usually start with (13) understanding and move towards detailed understanding rather than working the other way round. But (14) is also used after you have already carefully studied and you need to (15) the major ideas and concepts.

In order to be able to skim quickly and (16) through a text, you should know where to look for what you want. In preview skimming you read the introductory information, the headings and subheadings, and the summary, if one is provided. (17) this skimming, decide whether to read the material more thoroughly, and select the appropriate speed (18) you read.

The same procedure (19) for preview skimming could also be used to get an overview. Another method would be to read only key words. This is done by omitting the unnecessary words, phrases, and sentences.

In order to skim efficiently and fulfill your purpose, (20) practice is necessary.

2().

A.adapt

B.adopt

C.change

D.adept

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