基准不重合误差由前后()不同而引起。A、设讨基准 B、环境温度 C、工序基准 D、形

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问题:

基准不重合误差由前后()不同而引起。

A、设讨基准

B、环境温度

C、工序基准

D、形位误差

考点:加工中心操作工考试加工中心操作工高级技师加工中心操作工高级技师题库
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房地产中介服务是房地产交易、房地产咨询、房地产估价、房地产经纪等活动的总称。()

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初产妇,29岁,妊娠40周,检查骨盆各径线为:骶耻内径>11.5cm,坐骨棘间径9.5cm,出口横径7cm,耻骨弓角度呈80°。

该产妇骨盆应诊断为()

A.扁平骨盆

B.中骨盆狭窄

C.漏斗骨盆

D.畸形骨盆

E.均小骨盆

题型:单项选择题

Many people seem to think that science fiction is typified by the covers of some of the old pulp magazines, the Bug-Eyed Monster, embodying every trait and feature that most people find repulsive, is about to grab, and presumably ravish, a sweet, blonde, curvaceous, scantily clad Earth girl. This is unfortunate because it demeans and degrades a worthwhile and even important literary endeavor. In contrast to this unwarranted stereotype, science fiction rarely emphasizes sex, and when it does, it is more discreet than other contemporary fiction. Instead, the basic interest of science fiction lies in the relation between man and his technology and between man and the universe. Science fiction is a literature of change and a literature of the future, and while it would be foolish to claim that science fiction is a major literary genre at this time, the aspects of human life that it considers make it well worth reading and studying for no other literary form does quite the same things.

What is science fiction To begin, the following definition should be helpful: science fiction is a literary subgenre which postulates a change (for human beings) from conditions as we know them and follows the implications of these changes to a conclusion. Although this definition will necessarily be modified and expanded, it covers much of the basic groundwork and provides a point of departure.

The first point-that science fiction is a literary subgenre-is a very important one, but one which is often overlooked or ignored in most discussions of science fiction. Specifically, science fiction is either a short story or a novel. There are only a few dramas which could be called science fiction, with Karel Capek’s RUR (Rossum’s Universal Robots) being the only one that is well known, the body of poetry that might be labeled science fiction is only slightly larger. To say that science fiction is a subgenre of prose fiction is to say that it has all the basic characteristics and serves the same basic functions in much the same way as prose fiction in general, that is, it shares a great deal with all other novels and short stories.

Everything that can be said about prose fiction, in general, applies to science fiction. Every piece of science fiction, whether short story or novel, must have a narrator, a story, a plot, a setting, characters, language, and theme. And like any prose, the themes of science fiction are concerned with interpreting man’s nature and experience in relation to the world around him. Themes in science fiction are constructed and presented in exactly the same ways that themes are dealt with in any other kind of fiction. They are the result of a particular combination of narrator, story, plot, character, setting, and language. In short, the reasons for reading and enjoying science fiction, and the ways of studying and analyzing it, are basically the same as they would be for any other story or novel.

From the last paragraph, we know that people read science fiction especially for()

A. the discovery of meaning

B. the beauty of language

C. the display of character

D. the psychological complexity

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芬瑟岛(如下图所示)是世界上最大的沙岛,总面积1630平方千米。岛上分布着沙漠,同时还分布着世界上唯一生长在沙地上的雨林植被。读图完成小题。

芬瑟岛分布着世界上唯一生长在沙地上的雨林植被,其原因可能有()

①近热带雨林分布区,雨林植物种子传播至此

②沙地土层深厚,利于雨林植物根系向深处延伸

③来自海洋的盛行风带来较充沛的降水

④沿岸有暖流经过,有增温增湿作用

A.①②③

B.①②④

C.①③④

D.②③④

题型:单项选择题

下列()中低闪点液体。

A、乙醇

B、二硫化碳

C、松香水

D、香蕉水

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