汽轮机径向轴承的作用是什么？

商品验收程序为：①确定验收比例；②实物验收；③核对供货单位提供的验收凭证；④核对承运单位提供的运输单证；⑤验收准备。其顺序为（）

A.④⑤①③②

B.③④⑤①②

C.⑤③④①②

D.④①②⑤③

图为华北平原某城市平面图，读图回答问题。

小题1:关于该城市旅游规划的叙述不正确的是

A．在进行旅游规划时需要考虑该城市的自然、经济、社会等种种因素

B．旅游规划是该城市旅游业发展的纲领和蓝图

C．该城市吸引游客的主要旅游资源有国家森林公园、古代大型园林、国家级重点保护文物

D．该城市与客源市场较远小题2:若在该城市建一疗养院，你认为宜建在何处

A．A

B．B

C．C

D．D小题3:当地在发展旅游业的同时，还应注意的问题是

①旅游活动的规模要与旅游区的环境容量相适应

②该地生态环境较脆弱，开发不当易造成生态破坏

③一定程度上限制旅游地的发展，防止破坏自然风光

④利用林地和河湖积极开发观景别墅

⑤为防止水土流失，应限制一切产业活动

A．①③⑤

B．①②④

C．①②③

D．②④⑤

阅读理解。

     Mr. Peter Johnson, aged twenty-three, battled for half an hour to escape from his trapped car yesterday

when it landed upside down in three feet of water. Mr. Johnson took the only escape route through the boot

(行李箱).

     Mr. Johnson's car had finished up in a ditch (沟渠) at Romney Marsin, Kent, after skidding (打滑) on ice

and hitting a bank. "Fortunately, the water began to come in slowly," Mr. Johnson said. "I couldn't force the

doors because they were jammed (堵塞) against the walls of the ditch and dared not open the windows

because I knew water would come in." Mr. Johnson, a sweet salesman of Sittingborrne, Kent, first tried to

attract the attention of other motorists by sounding the horn.

     Later he said, "It was really a half penny that saved my life." It was the only coin I had in my pocket and

I used it to unscrew (拧开) the back seat to get into the boot. I hammered hard with a hammer trying to make

someone hear, but no help came.

     It took ten minutes to unscrew the seat and a further ten minutes to clear the sweet samples from the boot.

Then Mr. Johnson found a wretch (扳手) and began to work on the boot lock. Fifteen minutes passed by. "It

was the only chance I had. Finally it gave, but as soon as I moved the boot lid, the water and mud poured in.

I forced the lid down into the mud and scrambled (爬) clear as the car filled up."

     His hands and arms were cut and bruised (擦伤). Mr. Johnson got to Beckett Farm nearby, where he was

looked after by the farmer's wife, Mrs. Lucy Bates. Wrapped in a blanket, he said, "That thirty minutes seemed

like hours." Only the tips of the car wheels could be seen, the police said last night. The car had sunk into (陷

入) two feet of mud at the bottom of the ditch.

1. What is the best title for this newspaper article?

A. The Story of Mr. Johnson, a Sweet Salesman

B. Driver Escapes through Car Boot

C. Car Boot Can Serve as the Escape Route

D. The Driver Survived a Terrible Car Accident

2. Which of the following is the most important to Mr. Johnson?

A. The hammer.

B. The coin.

C. The screw.

D. The horn.

3. Which of the following statements is TRUE according to the passage?

A. Mr. Johnson's car stood on its boot as it fell down.

B. Mr. Johnson could not escape from the door because it was full of sweet jam.

C. Mr. Johnson's car accident was partly due to the slippery road.

D. Mr. Johnson struggled in the pouring mud as he unscrewed the backseat.

4. The underlined part "Finally it gave" means that _____.

A. luckily the door was tom away in the end

B. at last the wretch went broken

C. the lock came open after all the efforts

D. the chance was lost at the last minute

5. It may be inferred from the passage that _____.

A. the ditch was along a quiet country road

B. the accident happened on a clear warm day

C. the police helped Mr. Johnson get out of the ditch

D. the accident was partly due to Mr. Johnson's carelessness

试述副阀缓解位的形成和通路？

防震包装是为减缓内装物受到（）的保护性包装。

A.损坏

B.冲击损坏

C.振动损坏

D.冲击和振动