《侵权责任法》中规定，高度危险作业是指对周围环境具有高度危险性，对高度危险作业造成他

高血钾的心电图主要特点是（）

A.U波倒置

B.QRS波群增宽

C.ST段水平下移

D.T波倒置

E.T波高耸变尖，基底部狭窄，呈帐篷型T波

( )，使得它不同于一般商品的批量生产过程，其产品具有惟一性。

A．建设项目的固定性

B．设计的单一性

C．施工的单件性

D．管理组织的一次性

E．建设项目的单件性

阅读理解。

From Mr. Ward Hoffman.

      Sir, I was halfway through Professor Raj Persaud's article "What's the tipping point" (Financial Times

Weekend, April 9-l0) when it occurred to me that what I was reading was not ironic (讽刺的). If Prof

Persaud wants to know why Americans tip in restaurants, he need only ask the first American he meets in

London.

     Americans tip in restarts for one reason, and one reason only: we tip to supplement (补贴) the salary of

restaurant workers. Quality of service does not enter into it, beyond the fact that one may tip a bit less for

poor service, or a little more for good service.

     Not tipping at all in a non-fast-food restaurant is not a choice. In the US, one used to tip about 15 per

cent for dining in a family-style restaurant or in an up-market (高档的) restaurant. Here, in San Francisco

Bay area restaurants, we me encouraged to tip 20 per cent or more, to help restart workers live in this very

expensive area.

     After eating at an Italian restart in my city, I left a tip of 20 per cent on the non-tax part of our dinner bill.

It was expected. There is nothing more complicated (复杂的) than that about Americas tipping in restaurants.

                                                                                                                  Ward Hoffman,

                                                                                                             Palo Alto, CA 94306, US 

From Mr. Philip McBride Johnson.

     Sir, I agree with most of Raj Persaud's opinion about the doubtful value of tipping, but with one exception

(例外). Tips can be very useful when one is a repeat customer or diner.

     It is only when the tipper is a stranger and likely to remain so that the system does not work to his or her

advantage. But frequent a hotel or a restaurant, always tip a bit more, and the difference in service and

treatment will ba easily felt.

                                                                                                                   Phfiip McBnde Johnson,

                                                                                                                 Great Falls, VA 22066, US

1. What can we learn from Hoffrnan's letter?

A. Quality of service determines tipping in the US.

B. Americans don't tip in non fast-food restaurants.

C. Tipping in US upmarknt restarts is unnecessary.

D. How to tip in the United States is not complicated.

2. Johnson's letter shows ______.

A. a stranger in a restaurant is likely to tip a bit more

B. diners receive better service if they frequent a restaurant

C. repeat dinners may get good service if they tip a bit more

D. the tipping system works to the advantage of new customers

3. From tbe two letters, we can learn Professor Raj Persaud ______.

A. feels doubtful about the value of tipping

B. believes tipping improves quality of service

C. wats to ask Hoffman about tipping m the US

D. thinks tipping a bit mom one can get good service

4. The two letters most probably appears in a ______.

A. notice

B. handbook

C. book review

D. newspaper

婴幼儿流脑临床表现常不典型，见于（）

A.有咳嗽等呼吸道症状

B.拒食，呕吐，腹泻等消化道症状

C.烦躁不安，尖叫，惊厥

D.囟门隆起，脑膜刺激征可不明显

E.囟门隆起，脑膜刺激征明显

下列哪项是更年期功能性子宫出血的防治原则（）。

A．定期宫颈刮片

B．调整周期，减少出血

C．监测体内激素水平

D．口服铁剂

E．定期诊刮，以防癌变