钢材的对接焊缝能承受的内力,下列中哪一种说法是准确的?A.能承受拉力和剪力 B.能承

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问题:

钢材的对接焊缝能承受的内力,下列中哪一种说法是准确的?

A.能承受拉力和剪力

B.能承受拉力,不能承受弯矩

C.能承受拉力、剪力和弯矩

D.只能承受拉力

考点:注册建筑师建筑结构与设备建筑结构与建筑设备1
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遇到洪灾时,中学生一定要挺身而出,积极参加抢险活动。(    )

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已知关于x的不等式ax-b>0的解集是(1,+∞),则关于x的不等式(2-x)(ax+b)>0的解集是______.

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Section C (12 marks)

Directions: Complete the following passage by filling in each blank with one word that best fits the context.

When kids in parts of the world want to play, they often make soccer balls out of trash tied together with string. “ 小题1:  the areas used for playing fields are often rough and rocky, millions of real balls go flat (变瘪)   小题2:  24 hours,” says Tim Jahnigen, a California businessman. Determined to solve this problem,   小题3:   created an indestructible ball called the One World Futbol.

The ball is made of   小题4:  special material, ethylene-vinyl acetate foam. It’s lightweight, it’s flexible, and— 小题5:  important—it holds its shape.

The One World Futbol needs no pump   小题6: won’t wear out, even on rough surfaces. When tested, 小题7:   withstood (经受住) being crushed by a car, and even being chewed on by a lion.

Although it costs more to produce   小题8:  a typical soccer ball, Jahnigen estimates the One World Futbol can last 30 years. So far, it’s been given to kids in 143 countries. (154 words)

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Most Americans enjoy moving from place to place. For example, they often drive their cars 120 to 160 kilometers away just to have dinner with a friend or even fly to Europe just for watching a football match. In some states only one person in five lives in a place for more than five years. One may be born in one city, and go to school in another. He may finish his middle school in two or three cities, and then attend a college far across the country. When he has entered business, he may possibly move from job to job. Moving from one job to another, which is called “job-hopping”, is a very common practice in the United States. Job-hopping is good to workers, because every change of a job gives them a chance to move up to a higher position and to get better pay. And job-hopping also gives bosses the chance to get new ideas and skills that different people bring to their companies and factories.

1. According to this passage, Americans often travel_______.

A. in order to have dinner with their friends

B. in order to watch football matches

C. to enjoy themselves

D. in order to find a new job

2. In some places in America, ________ for more than five years.

A. most people stay in one place

B. about 20% of the people live in one place

C. the owners of houses stay in one place

D. the owners of five house stay in one place

3. In the USA, job-hopping_______.

A. has become the custom (习惯)

B. has helped young people to attend to college

C. has helped students to enter business

D. has helped worker in traveling

4. The writer thinks________.

A. job-hopping does good either to workers or to the bosses

B. job-hopping does good neither to the workers nor to the bosses

C. little of the job-hopping

D. highly of the job-hopping

题型:单项选择题

执行下面的程序,消息框里显示的结果是 【13】
Private Sub Form_Click()
Dim Str As String, K As Integer
Str="ab"
For k=Len(Str) TO 1 Step-1
Str=Str & Chr(Asc(Mid(Str,k,1))+k)
Next k
MsgBox Str
End Sub

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