调质和正火两种热处理工艺所获得的组织分别为回火索氏体和索氏体,它们的区别在于碳化物的

题型:判断题

问题:

调质和正火两种热处理工艺所获得的组织分别为回火索氏体和索氏体,它们的区别在于碳化物的形态差异。

考点:材料科学机械工程材料机械工程材料题库
题型:判断题

纤维素虽然不能被人体消化吸收,但可通过在大肠中吸收水分,将()及时排出。

A.小便

B.大便

C.眼泪

D.鼻涕

题型:判断题

心力衰竭获得基本控制的临床表现为()。

A.心率呼吸减慢

B.肝脏缩小

C.尿量增加,浮肿消退或体重减轻

D.心脏回缩

E.食欲精神好转

题型:判断题

在发电厂的直流系统中,下列哪些负荷为控制负荷?()

A.电气和热工的控制、信号、测量负荷

B.继电保护负荷

C.断路器电磁操动的合闸机构负荷

D.系统远动、通信装置的电源负荷

题型:判断题

任务型阅读。

     阅读下面短文并回答问题(请注意问题后的词数要求)。

    [1] Imagine walking up to a world where China is the

world's leading superpower, astronauts are busy walking on

Mars and a brand new political party is ruling the UK? Well,

this could be the reality in 13 years if some of the predictions of

100,000 Britons are correct.

   [2] The survey asked the people of the UK how they

pictured the world in 2025.

   [3] Nearly half believe Prince William will be crowned

King of England instead of Prince Charles although one in six

think the monarchy ( 君主制度) will have been abolished. A

quarter of those surveyed believe a new party will form the

government in 2025, although the same number of people think

that labour will be back in power.

    [4] On the world stage 60 per cent think China is set to

become the world's leading superpower, while a third think

Great Britain will be made up of four self-governed countries.

     [5] Meanwhile technology will have come on in leaps and

bounds. Four percent are optimistic that there will be a

permanent human base on Mars while one in ten expect a

colony of humans to be living in space. More than half

questioned in the MSN study predict people will watch all their

favorite shows via TV sets hooked up to the Internet. Two-

thirds believe cosmetic surgery ( 整容手术) will have become

common and one in six think we will look after our own health

using computers rather than _                .

    [6] But at least we can amuse ourselves with the daily

comings and goings of pop singers and reality stars, as more

than half think that "celebrity"  ( 明星) will be a registered

profession.

1. What is the main idea of the text?  (  no more than 10words)

____________________________________________________

2. Which sentence in the text is closest in meaning to the following one?

The British people were questioned about their predictions of the world in 13 years.

____________________________________________________

3. Fill in the blank in Paragraph 5 with proper words. ( no more than 5 words)

____________________________________________________

4. Many people think cosmetic surgery will have becomecommon by 2025.

     What's your opinion? Please give at least two reasons. ( no more than 25 words)

_________________________________________________________

5. Translate the underlined sentence in Paragraph 3 intoChinese.

_________________________________________________________

题型:判断题

电分相锚段关节各悬挂间的有效绝缘距离必须大于()mm

A、350

B、500

C、400

D、450

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