试题与答案

(6分)同学们已经学习了几种典型的有机化学反应类型——取代反应、加成反应、酯化反

题型:填空题

题目:

(6分)同学们已经学习了几种典型的有机化学反应类型——取代反应、加成反应、酯化反应等,写出下列反应的化学反应方程式,并判断其反应类型。

①由乙烯制氯乙烷:                                       ,属于        反应;

②由苯制取硝基苯:                                        ,属于        反应;

③由苯制取环己烷:                                        ,属于        反应;

答案:

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参考答案:B解析:P波是左右心房兴奋后产生的,P-R间期是冲动从心房传导到心室的时间,QRS波为两个心室兴奋后的复合波,T波反映心室兴奋后再极化的过程,U波为心肌普肯耶细胞再极化后形成的波。【该题针对“心律...

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题型:阅读理解

阅读理解。

      Many young people want to be pop stars. They think it would be a wonderful life. In fact most pop

stars have very hard lives. They spend much of their time on tour, and though this can be fun, it can also

be exhausting(疲倦).

     This is a typical day in the life of pop star on tour.

Novermber 26

     5:00 A.M. Woke up in hotel room. Packed bags. Met manager in hotel lobby. Took taxi to airoirt.

     6:00 Breakfast at airport. Discussed day's timetable with manager. Plane's departure delayed an hour

by fog.

     7:45 Finally boarded plane.

     8:30 Arrived and waited half an hour for luggage. Then gave interview to TV crew.

     9:45 Gave first radio interview of the day.

     10:15 Went from radio station to radio station giving interviews.

     12:00 P.M. Interview and lunch with stupid journalist who'd never heard of me.

     1:00 Had photo for newspaper.

     1:15 Went to theatre to check lighting. Met local producer and band-very poor.

     2:00 Rehearsed show. Band a little better.

     5:00 Back to hotel. Showed and tried to test but too worried about band.

     6:30 Back at theatre. Changed into costume for show.

     7:30 On stage at last. Gave performance. Band very bad but audience love me.

     10:00 Party after show. Met fans and more journalists.

     11:00 Fell into bed exhausted. Set alarm for the morning.

1. The main idea of the passage is ______.

A. lots of young people want to be pop stars

B. most pop stars have hard lives

C. pop stars have a wonderful life

D. pop stars have a lot of fun on tour

2. When did the pop star give interviews?

A. From 6:00 a.m. to 1:00 p.m..

B. From 7:45 a.m. to 10:15 p.m..

C. From 9:00 a.m. to 1:00 p.m..

D. From 8:30 a.m. to 10:15 p.m..

3. What was wrong with the performance?

A. The pop singer performed badly.

B. The audience didn't like the pop star.

C. The show didn't srart on time.

D. The band performed badly.

4. Why do pop star have hard lives?

A. Because lots of people want to be pop star.

B. Because they spend a lot of time touring.

C. Because touring isn't exhausting.

D. Because being a pop star is wouderful.

5. How long was the popular star's day?

A. 11 hours

B. 16 hours

C. 18 hours

D. 12 hours

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