止回阀通常安装在泵出口管道、锅炉给水管或其他()A、允许 B、不允许 C、通过 D、

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问题:

止回阀通常安装在泵出口管道、锅炉给水管或其他()

A、允许

B、不允许

C、通过

D、不通过

考点:汽油加氢装置操作工考试初级汽油加氢装置操作工考试初级汽油加氢装置操作工考试题库
题型:单项选择题

下列各句中加粗的成语使用正确的一句是[ ]

A.2007年硕士研究生就业形势不容乐观,有些研究生认为自己师出无名,没有名师弟子的光环,因而遭冷遇。

B.现在小学都把英语作为必修课了,长此以往我国的英语教育会大众化,每人能说一口较流利的英语不再是奢望。

C.天网恢恢,疏而不漏。3月15日,马加爵在海南落网,公安部A级通缉令上的其他6名嫌疑犯也必将在劫难逃

D.这些飞行人员在处置重大空中特殊情况的过程中,气贯长虹,用忠诚、果敢和智慧谱写了一曲曲革命英雄主义壮歌。

题型:单项选择题

For nearly a century before there was such a thing as a space program,a view of space was possible.People could see full views of the Moon,explore Mars(探测火星),and study the outer space beauty.All of this was made possible by a small group of artist-astronomers(天文艺术家) who worked to show people how other worlds in space might look.

Lucien Rudaux,a French artist,was the first to use his artistic ability and his knowledge of astronomy in art.His paintings show a mixture of skilled observations,brilliant imagination and careful attention.As a result,many of his works have come surprisingly close to actual conditions on distant planets.His painting of Mars included moonlike craters(火山口) that were first photographed by the astronauts in 1965.His 1930 painting of a dust storm looks remarkably like a photograph of a storm taken by the astronauts in 1976.

The artist-astronomers,including Rudaux,made people interested in outer space by painting what turned out to be exact portraits of the planets.

小题1:The passage tells us _________.

A.the surprising exactness of space artists

B.the popular success of Lucien Rudaux

C.the imaginations of great artists

D.the likeness between the Moon and Mars小题2:According to the passage,artist-astronomers spent their lives _________.

A.exploring the planets

B.studying paintings

C.painting the planets

D.producing spaceships小题3:The works of Lucien Rudaux are a mixture of _________.

A.astronomy and mathematics

B.astronomy and painting

C.photograph and art

D.fact and imagination小题4:In 1965,the astronauts photographed _________.

A.a spaceship

B.a planet

C.craters on the Moon

D.a painting

题型:单项选择题

几个导体串联起来总电阻比其中任何一个导体的电阻都______,因为导体的串联相当于增加了导体的______.

题型:单项选择题

下列有关腹痛的叙述,错误的是()

A.胆石症患者的腹痛常发生于夜间睡觉期间

B.急性胃肠炎的腹痛常在不洁饮食6小时后出现

C.进食油腻饮食后出现的腹痛,可能为急性胆囊炎或胆石症

D.饱食者剧烈活动后出现的急性腹痛首先考虑肠扭转

E.既往曾有腹部手术史者,腹痛多应考虑粘连性肠梗阻

题型:单项选择题

在闸门的设计条件和校核条件下,水工钢闸门的结构计算包括:()。

A.强度验算

B.刚度验算

C.整体稳定性验算

D.局部稳定性验算

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