70二小时氧气呼吸器减压器安装在压力表同一位置。

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问题:

70二小时氧气呼吸器减压器安装在压力表同一位置。

考点:煤气输送工考试煤气输送工初级煤气输送工初级题库
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关于声现象的描述,下列说法中正确的是(  )

A.课堂上同学回答问题时,发出的声音是由声带振动产生的

B.声音在水中的传播速度比在空气中的传播速度慢

C.“未见其人,先闻其声”是根据声音的音调辨别发声者的

D.只要物体在振动,我们就一定能够听到声音

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采购评价制度主要包括()。

A.上级评价

B.自我评价

C.对每个人的评价

D.整体评价

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Need more evidence that London is a serious coffee town? Mr. Davies is actually England’s third consecutive world barista champion. The first was James Hoffmann, who started Square Mile Coffee Roasters squaremilecoffee.com) in 2008 .It’s a small operation, recently relocated to an arched vault under some train tracks in East London.

Today, Square Mile’s black bags of beans have become shorthand for quality. They supply beans to Moon Bar (3 Bateman Street; 44-20-7287-4796), just opened by the same team behind Flat White (17 Berwick Street; 44-20-7734-0370; flat-white.co.uk).

Though it’s recently been co-opted(增加的) by chain stores, the “flat white” is also a symbol of serious coffee: it’s basically a cappuccino-size style— flat and white — a style imported from Australia (some say New Zealand) when a wave of baristas emigrated from those countries. (Australians and New Zealanders are to espresso what Russians are to chess: they’re just better at it.)

Still, independent stores continue to appear in all corners of the city. Last year, the Espresso Room (31 Great Ormond Street; 44-20-7932-137-380; theespressoroom.com) opened in a truly tiny storefront. Yet the owner Ben Townsend manages to fit a Marzocco espresso machine, some benches and a case with pastries.

And farther north in Islington, a bar called Tina, We Salute You (47 King Henry’s Walk; 44-20-3119-0047; tinawesaluteyou.com) opened last February. (According to the owners, the name comes from a daily greeting they give to a cheesecake portrait of a curvy subject named Tina.)

45. How many bars are mentioned in the text?

A. 4        B. 5.       C. 6      D. 7

46. We can read in the passage that Square Mile Coffee Roasters is well-known for its________.

A. milk    B. chess   C. beans   D. fruit

47. According to the text, we know that________.

A.UK is home to the flat-white.

B. the flat-white is exported from Australia.

C. chess is popular in Russia.

D. you can find the flat-white only in the chain stores.

48. The writer wrote this passage in order to tell us________.

A. the meaning of   “flat white”.         B. London is famous for its history.

C. the number of coffee bars in London    D. London is famous for its coffee bar.

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“海因里希法则”是美国著名安全工程师海因里希提出的,这个法则是:当一个企业有300个隐患或违章,必然要发生29起轻伤或故障,在这29起轻伤事故或故障当中,会有一起重伤、死亡或重大事故。

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性病是指通过性行为或类似性行为传播的一组传染性疾病。性传播疾病是可以预防的。

利用各种媒介向大众宣传性病的传播途径和有效预防措施是()

A.二级预防

B.三级预防

C.先期预防

D.一级预防

E.原级预防

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