HXD3型电力机车闭合主断路器时,应如何操作?

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问题:

HXD3型电力机车闭合主断路器时,应如何操作?

考点:电力机车司机考试和谐电3型机车司机和谐电3型机车司机题库
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慢性肺源性心脏病最多见的病因是

A.支气管哮喘

B.慢性弥漫性肺间质纤维化

C.支气管扩张

D.慢性支气管炎并发阻塞性肺气肿

E.重症肺结核

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He had travelled thousands of miles in the hope of earning some money,but 18-year-old Lin Kongming never knew danger was waiting for him.

He and six other migrant workers from Fujian Province spent 36 hours in Iraq as international hostages(人质). But luckily,they were set free last Tuesday morning,unharmed by the people who had taken them hostage.

After hard work by Chinese diplomats(外交官)in the region the Iraqi kidnappers(绑架者)agreed to hand them over to a local religious group.“The friendly relations between the Chinese and Iraqi peoples have played a key role in the release of the hostages,”said Foreign Ministry spokesman Kong Quan. China refused to join the US-led coalition(联军)in the Iraq war.

Since April 4,over 60 hostages from 12 countries,including America,Italy and Japan,have been taken in Iraq. Some have been released, others were killed.

The Iraqi resistance groups have started taking foreigners hostage in an attempt to force the US-led troops out of their country. As a result,many foreigners have left,fearing the situation will get worse. Some nations are also considering removing their troops from Iraq. Thailand has ordered its forces not to leave their camp and may bring them home before September as originally planned. New Zealand Prime Minister Helen Clark is considering similar action.

But Dan Senor,spokesman for the US-led coalition in Baghdad,said that it would not negotiate(谈判)with “terrorists or kidnappers” to get hostages released.

小题1:The seven workers from Fujian were set free mainly because ______.

A.they were too poor to pay anything

B.kidnappers didn’t know they were Chinese

C.China didn’t take sides with the US-led coalition

D.kidnappers were friendly to the Chinese小题2:Why did the Iraqi resistance groups start to take foreigners hostage?

A.To show their anger towards the occupation of foreign troops.

B.To tell the world they would fear nothing.

C.To make foreign armies leave their country.

D.To resist the American troops.小题3:The author mentioned Dan Senor to show the US ______.

A.wouldn’t give in to Iraqi terrorists or kidnappers

B.had enough power to station in Iraq

C.wouldn’t give up unless it could get something

D.had no plan to bring its troops home小题4:The passage mainly tells us ______.

A.the hostage crises in Iraq

B.foreigners were not welcome in Iraq

C.the Chinese hostages were set free

D.keeping away from Iraq is a wise choice

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如图所示,两拫等长的轻绳AB、CD将日光灯悬挂在水平天花板上,AB绳、CD绳与天花板间的夹角都为 60°,日光灯质量为m,则AB绳、CD绳所受拉力大小分别为(  )

A.

3
2
mg和
3
2
mg

B.

3
3
mg和
3
3
mg

C.

3
mg和
3
mg

D.

3mg和
3
2
mg

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开元八年,十九岁的李白去渝州拜见刺史李邕,希望得到他的赏识,结果受到了冷遇。李白愤然写道:“宣父犹能畏后生,丈夫不可轻年少。”请问传说中,让孔子由衷感叹“后生可畏”并拜他为师的是哪位七岁孩童?

题型:问答题 简答题

非金属弹性件、吊挂件及套环、承载体等,其最小断裂载荷与其承受最大静荷载的比例,应不小于()

A、6

B、7

C、8

D、10

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