上海期货交易所的交易机制是一种典型的拍卖，这种拍卖属于（）.A.英式拍卖 B.荷兰式

男性，60岁。冠心病病史10年，今日突发晕厥，持续约1分钟。查体：BP130/70mmHg，心音强弱不等，节律绝对不整，心率42次/分。该患者的心电图可能为（）

A.室性早搏

B.心房纤颤

C.心肌缺血

D.急性心梗

E.一度房室传导阻滞

阅读理解。

     Music is an international language. The songs that are sung or played by instruments are beautiful to all

people everywhere.

     Popular music in America is what every student likes. Students carry small radios with earphones and

listen to music before class, after class, and at lunch. Students with cars buy large speakers and play the

music loudly as they drive on the streets.

     Adult drivers listen to music on the car radio as they drive to work. They also listen to the news about

sports, the weather, politics, and activities of the American people. Most of the radio broadcast is music.

     Pop or popular music singers make much money. They make a CD or tape which radio stations use in

every state. Once the pop singer is heard throughout the country, young people buy his or her tapes. Some

of the money from these tapes comes to the singer. Wherever the singer goes, all the young people want to

meet him or her. Now the singer has become a national star.

     There are other kinds of music that are important to Americans. One is called folk music. It tells stories

about the common life of Americans. Another is called western or country music. This was started by

cowboys who would sing at night to the cows they were watching. Today, any music about country life and

the love between a country boy and his girl is called western or country music.

     Serious music for the concert halls is called classical music. Music for instrument is called orchestra

music (管弦乐),such as the symphonies (交响乐) of Beethoven. There is opera (歌剧 ) for singers. There is

ballet (芭蕾舞剧 ) for dancers like Liang Shanbo and Zhu Yingtai in China.

1. In what sense can music be regarded as an international language? 

A. Popular music is what everyone enjoys.

B. The songs that are sung or played by instruments are so beautiful and

    understandable that everyone can enjoy them.

C. When music is played, it seems as if it were speaking to us.

D. Music is so popular throughout the world that everyone can play it.

2. What can we know about music and people in America?

A. Student drivers carry small radios with earphones when they drive on the streets.

B. Students always listen to music before class, in class and after class.

C. Adult drivers listen to news as well as music when they drive to work.

D. Adult drivers never listen to music when they drive to work.

3. How many kinds of music are mentioned in the passage?

A. Six.

B. Eight.

C. Five.

D. Seven.

4. Which of the following is TRUE according to the passage?

A. All people in America like pop music.

B. Pop singers can get all the money from the tapes.

C. Now, western or country music is a little different from its beginning.

D. Liang Shanbo and Zhu Yingtai is a kind of pop music.

很可能引起氟中毒的氟摄入阈值是（）

A.3mg/kg

B.4mg/kg

C.5mg/kg

D.6mg/kg

E.8mg/kg

橡胶底靴

神经调节的结构基础是（）

A.反射

B.反射弧

C.感受器

D.神经中枢