问题 单项选择题 共用题干题

某基层医院检验科生化室的一位年轻技术人员在进行血清蛋白醋酸纤维素薄膜电泳时,经常遇到结果不理想而产生困扰。

有关薄膜透明问题,叙述错误的是()

A.薄膜不能完全透明的原因是薄膜尚未完全干燥就进行透明处理

B.透明液中醋酸浓度过低导致薄膜透明不完全

C.薄膜在透明液中溶解的原因是透明液中醋酸浓度过大

D.薄膜透明后出现皱缩的原因是透明后未经完全干燥就从玻片上取下

E.透明问题与膜质量无关

答案

参考答案:E

阅读理解

阅读理解。

                                                         Bicycle Tour (旅行) and Race

     A bike tour and race will be held on August 26 and 27(Sat. & Sun.) at 5:30 a.m. The riders will leave Tian

anmen Square and ride the first 35 kilometers as a training leg. Then the next 55 kilometers leg, from Yanjiao to

Jixian, will be the first competitive (竞争性的) part of the tour. The riders and their bikes will then be taken

from Jixian to Changli.

     The second racing leg of the tour will be from Changli to the seaside of Nandaihe, covering a distance of

20 kilometres. Saturday night the riders will stay at Nandaihe for supper. Sunday morning is free for playing at

the seaside. At noon all the people and their bikes will be taken back to Beijing.

     Cost: 200 yuan

     Telephone: 4675027

     Ticket price: ¥60, ¥100, ¥150

     Time/Date: 4:30 p.m.,August 26(Sat.)

     Telephone: 5012372

                                                                 Rock Climbing

     The Third National Rock Climbing Competition will be held on August 26-27 at the Huairou Mountain

Climbing Training Center. More than 10 teams from Beijing, Wuhan, Dalian, Jilin and other places will take part

in it. A Japanese team will give an exhibition(展出) climbing free for audience.

     Take a bus from Dongzhimen to Huairou.

     Time/Date: 9:00~12:00, August 26 and 27

     Telephone: 7143177, 7144850

1. The main purpose (主要目的) of the passages in the newspaper is to give information about _____.

A. visiting teams

B. famous players

C. things to do for the weekend

D. prices to pay for the sports events

2. If you take part in the bike tour, you will probably ride for ______.

A. 35 kilometers

B. 55 kilometers

C. 75 kilometers

D. 110 kilometers

3. The underlined word "leg" in"Bicycle Tour and Race" probably means______ .

A. race

B. practice

C. part of the training

D. part of the tour

4. What is special about the rock climbing competition?

A. A foreign team takes part in it.

B. You can watch it without paying.

C. You don't have to be a sportsman to take part in.

D. The bus trip to the place of the competition is free.

5. If you want to find something to do for Saturday afternoon, which telephone number will you call?

A. 4675027.

B. 7143177.

C. 5012372.

D. 7144850.

单项选择题