钢管弯曲时，管内壁与管外壁各点均受压。（）

根据短文内容和首字母提示，在下文空格处填入适当的词使短文完整。

     John's a fourteen-year-old boy. His family is very rich, so John d__1__ think it's necessary (必要)

for him to work hard. He spends lots of time and money o__2__ computer games. He often plays them

three hours except doing his homework every day.

    Usually his father's d__3__ takes him to school in his father's car. Then he drives John's father to his

office. O__4__ evening, his father tells John that he has to go to the airport (机场) early tomorrow

morning, so he will n__5__ the car at the same time when John goes to school. John asks, "Oh, well,

h__6__ can I go to school tomorrow if you need your car?" His father wants John to know how d__7__

the life is for the poor people in the world. He answers, "I think you'll go in the same w__8__ as other

children in the world…". "Daddy, b__9__ taxi." John suddenly says, "I know it's the b_10__ and

fastest way." His father shakes (摇头) his head and says softly " on foot, I mean".

在浅气层段钻进或起下钻，井筒钻井液柱压力稍不平衡，天然气就会迅速进入井眼。（）

A、对；

B、错。

国税系统车辆编制统一核定后，各单位应（）。

A.按需求配备

B.按预算配备

C.在车辆编制数量内按预算提出需配备和购置车辆实施计划

D.并按有关规定办理政府采购和固定资产登记等手续

建设项目中防治污染的设施，应当与主体工程同时设计、同时施工、同时投产使用。防治污染的设施应当符合经批准的环境影响评价文件的要求，不得擅自拆除或者闲置。

①近几年来，他们______了不少资料，向美国读者介绍中华移民遭受歧视和虐待的详情。

②这类事件，十年前______存在，现在可没听说过。

③一本只有几十页的小书，居然附有两页纸的______表，这实在让人深思。

依次填入划横线处的词语，最恰当的一组是（）。

A．收集；允许；勘误

B．搜集；容许；勘误

C．收集；容许；刊误

D．搜集；允许；刊误