问题 填空题

用化学方程式表示下列反应,并在括号内注明基本反应类型.

锌跟稀硫酸反应______[______]

氢氧化铜跟盐酸反应______[______].

答案

锌和稀硫酸反应生成硫酸锌和氢气,反应的化学方程式为:Zn+H2SO4═ZnSO4+H2↑;该反应是一种单质和一种化合物反应生成另一种单质和另一种化合物的反应,属于置换反应.

氢氧化铜跟盐酸反应生成氯化铜和水,反应的化学方程式为:Cu(OH)2+2HCl═CuCl2+2H2O;该反应是两种化合物相互交换成分生成两种新的化合物的反应,属于复分解反应.

故答案为:Zn+H2SO4═ZnSO4+H2↑;置换反应.

Cu(OH)2+2HCl═CuCl2+2H2O;复分解反应.

阅读理解

阅读理解.根据短文内容,选择正确答案。

     In almost every big university(大学)in the United States, football is a favorite sport. American

football is different. Players sometimes kick the ball, but they also throw the ball and run with it.

They try to take it to the other end of the field. They have four chances(机会)to move the ball

ten yards(码). They can carry it or they can throw it. If they move the ball ten yards, they can

try to move it another ten yards. If they move it to the end of the field, they receive six points(点).

     It is difficult to move the ball. Eleven men on the other team try to stop the man with the ball.

If he does not move the ball ten yards, his team kicks the ball to the other team.

Each university wants its own team to win. Many thousands of people come to watch. They all

shout for their favorite team.

     Young men and women come on the field to help the people shout more. They dance and

jump while they shout.

     Each team plays ten or eleven games each season.

     The season begins in September and ends in November. If a team is very good, it may play

another game after the season ends. The best teams play again on January 1st, the first day of the

New Year. Many people go to see these games and many others watch them on TV.

1.The passage talks about ______.

A.football                        

B.how to play football

C.American sports            

D.American football

2.We can ______ the football in both American football and Chinese football.

A.kick    

B.throw

C.run with

D.catch

3.Why is it difficult to move the ball? Because ______.

A.ten yards is a long way

B.many men on the other team try not to let the ball come near

C.the playing field is very large

D. eleven men have to catch the ball one by one

4.If they ______, the teams will play on January 1st.

A.receive six points

B.play eleven games in the season

C.are the best teams    

D.move the ball to the end of the field

5.Many people come to watch football and they want their team to win.

   Which of the following is not their act?

A.Jumping

B.Dancing

C.Crying    

D. houting

填空题