火车由静止做匀加速直线运动,在1min内行驶了540m,则它在最初的10s内的位

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问题:

火车由静止做匀加速直线运动,在1min内行驶了540m,则它在最初的10s内的位移是(  )

A.90m

B.45m

C.30m

D.15m

考点:匀变速直线运动的位移与时间的关系
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下列哪一种血清酶对急性心肌梗死最具特异性()

A.LDH

B.CK-MB

C.ALT

D.AST

E.GGT

题型:选择题

从小明、小华和小雯中抽取一人参加校文艺宣传队,采取的方法是由他们三人自由抽签决定,你认为他们抽中的机会为(  )

A.谁先抽谁抽中的机会大

B.三人抽中的机会相同,与谁先抽无关

C.谁抽中的机会大,全凭运气

D.谁最后抽谁抽中的机会大

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男性,25岁。车祸致伤2小时。查体:左大腿中段外侧皮肤有一长约2cm伤口,深及皮下,未见外露的骨折端。X线检查:左股骨中上段横断骨折。正确的临床诊断是()。

A.左股骨闭合性骨折,左大腿皮肤裂伤

B.左股骨Ⅰ度开放性骨折

C.左股骨Ⅱ度开放性骨折

D.左股骨Ⅲ度开放性骨折

E.以上都不是

题型:选择题

Expressions about water are mostly as common as water itself.

The expression “to be in hot water” is one of them. It is a very old expression. Hot water was used five hundred years ago to mean being in trouble. One story says it got that meaning from the custom of throwing extremely hot water down on enemies attacking a castle. That no longer happens. But we still get “in hot water”. When we are in hot water, we are in trouble. It can be any kind of trouble, serious or not so serious. A person who breaks a law can be in hot water with the police. A young boy can be in hot water with his mother if he walks in the house with dirty shoes.

“Being in deep water” is somewhat like being in hot water. When you are in deep water, you are in a difficult position. Imagine a person who can not swim being thrown in water over his head. You are in deep water when you are facing a problem that you don’t have the ability to solve. You can be in deep water, for example, if you invest in stocks without knowing anything about the stock market.

“To keep your head above water” is a colorful expression that means staying out of debt. A company seeks to keep its head above water during economic hard times. A man who loses his job tries to keep his head above water until he finds a new job.

“Water over the dam” is another expression about past events. It is something that is finished, and cannot be changed. The expression comes from the idea that water has floated over a dam and cannot be brought back again. When a friend is troubled by a mistake he or she has made, you might tell him or her to forget about it. You say it is water over the dam.

Another common expression “to hold water” is about the strength or weakness of an idea or opinion that you may be arguing about . It probably comes from a way of testing the condition of a container. If it can hold water, it is strong and does not have any holes; if it does not hold water, then, it is weak and not worth debating.

“Throwing cold water” also is an expression that deals with ideas or proposals. For example, you want to buy a new car because the old one has some problems, but your wife throws cold water on the idea because she says a new car costs too much.

60. Don’t cheat in this exam! Or you’ll      if you are caught cheating by the teacher.

A. be in hot wate                  B. have to hold water

C . be in deep water                 D. keep your head above water

61.The expression using water in Paragraph       has almost the same meaning as “Things done cannot be undone.”

A. 3    B. 4   C . 5    D. 6

62. We can see from this passage that many of the expressions using water have         meanings.

A. double   B. unpleasant   C . close   D. moral

63.The best title for this passage should be         .

A. The history of water         B. Cold water or hot water

C . Water and it culture         D. Expressions concerning water

题型:选择题

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