无缝线路困难条件下处理跑道:可用乙炔切断钢轨,松开扣件,放散应力,然后用夹板和()加

题型:单项选择题

问题:

无缝线路困难条件下处理跑道:可用乙炔切断钢轨,松开扣件,放散应力,然后用夹板和()加固。

A、急救器

B、螺栓

C、道钉

D、铁丝

考点:铁路线路工初级线路工理论知识初级线路工理论知识题库
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The majority of doctors ______ smoking is harmful to health.

A.are believed

B.had believed

C.has believed

D.believe

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学生是数学学习的主人,教师是数学学习的组织者、______与______。

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                                                        How to be Prepared

    Electricity, water, gas and telephone may not be working after an earthquake. The police and fire

department are likely to be tied up. You should be prepared to take care of yourself for at least three

days, preferably for a week.

     This list can also be applied to other disasters, such as floods or wildfires.

1.food and water (a gallon a day per person )

2.a first aid kit

3.a fire extinguisher suitable for all types of fires

4.flashlights, a portable radio extra batteries

5.blankets, clothes, shoes and money (ATMs may not work)

6.baby and pet food

     It's also a good idea to decide beforehand how where your family will reunite if separated during

a quake and to conduct in-home practice drills. You might choose an out-of-the-area friend or relative

that family members can call to check on you.

                                                   During an earthquake

     If you are indoors, stay there. Get under and hold onto a desk or table, or stand against an interior

wall. Stay away from exterior walls, glass, heavy furniture, and stay away from windows and outside

walls and do not use the elevator.

     If you are outside, get into the open, stay into the open, stay away from buildings, power lines or

anything else that could fall on you.

     If you are driving, move the car out of traffic and stop, avoid parking under or on bridges or

overpasses. Try to get clear of trees, light posts, signs and power lines.

If you are in a crowded public place, avoid panicking and do not rush for the exit. Stay low and cover

your head and neck with your hands and arms

                                                         After an earthquake

     If the phone is working, only use it in case of emergency. Likewise, avoid driving if possible to keep

the streets clear for emergency vehicles.

Be aware that items may fall out of cupboards or closets when the door is opened, and also that

chimneys can be weakened and fall with touch. Check for cracks and damage to the roof and foundation

of your home.

     Listen to the radio for important information and instructions. Remember that aftershocks, sometimes

large enough to cause damage in their own right,generally follow large quakes.

     If you leave home,leave a message telling friends and family your location.  

1.Which of the following items is unnecessary to prepare before an earthquake?

A. batteries  

B. Cash   

C. Medicine    

D. Credit card

2.When an earthquake comes,you should ______.

A. hide yourself in the kitchen        

B. rush for the exit immediately

C. stay away from heavy objects        

D. call the police right away

3.When an earthquake is over,you should______.

A. drive a car to take your family to the safe place

B. check the security of your home

C. call your relatives to tell them you are safe

D. clear up the mess as soon as possible.

4. Which of the following sentences is true according to the passage?

A. You'd better make it clear how and where your family will reunite if separated during a

     quake after the quake happens.

B. If you are indoors, get into the open.

C. If you are in a crowded public place, avoid panicking and do rush for the exit.

D. If the phone still works, only use it when necessary.

5. What does the underlined word "aftershock " mean?

A. A less serious quake following a large earthquake in the same area.

B. A further reaction following the shock of a deeply disturbing thing.

C. A mess one has to deal with after a terrible thing.

D. An instruction the government gives to solve problems.

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用玻片法做网织红细胞计数的缺点是( )

A.容易使血液中水分蒸发
B.染色时间较试管法长
C.有时结果偏高
D.重复性较好
E.以上都不对

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(二)某家庭购买了一套价值为40万元的普通住宅,首付款为房价的30%,其余房款用银行提供的贷款期为20年、年贷款利率为6%、按月等额还本付息的个人住房抵押贷款支付。该家庭为首次购买商品住房。

对该家庭的购买行为产生直接影响的风险因素为( )。

A.贷款利率上调

B.房价下跌

C.房地产周期波动

D.资本价值变化

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