问题 填空题

用下列物质的化学式填空:氢气、氧气、木炭、一氧化碳、二氧化碳、甲烷,并写出有关反应的化学方程式:

(1)能使带火星的木条复燃的是          ;(2)天然气的主要成分是            ;(3)能与氧化铜反应的是                ;(4)能够燃烧的是                  

(5)能使澄清石灰水变浑浊的气体是          ,分别写出①该反应、②这种气体与水反应的化学方程式:①                                                       

                                                           

答案

(1)O2       (2)CH4  (3)H2、C、CO                (4)H2、C、CO、CH4

(5)CO2    CO2+Ca(OH)2="==" CaCO3↓+H2O     CO2+ H2O ="==" H2CO3

(1)能使带火星的木条复燃的是,具有助燃性的氧气;

(2)天然气的主要成分为甲烷;

(3)氢气、木炭、一氧化碳都能使与氧化铜反应,将氧氧化铜还原为铜;

(4)氢气、木炭、一氧化碳、甲烷都具有可燃性,都能燃烧;

(5)能使澄清石灰水变浑浊的气体是:二氧化碳;它与澄清石灰水反应生成碳酸钙沉淀,二氧化碳与水反应生成碳酸。

阅读理解

Tigers are terrible animals, but a cat is a cute animal.    As a mother, the Chinese-American writer Amy Chua is just a tiger . Her book, Battle Hymn of the Tiger Mother (《虎妈战歌》), tells us how she gives her two children education.    She says that being strict is the only way to train a child’s talent. Her kids had to obey the following rules. To begin with, her kids weren’t allowed to watch TV or play computer games. Then, they were not allowed to “ hang out ” with other kids after school. They had to be the top students in their class. And they had to practice the piano and the violin for hours every day. Of course, she believes this has brought a lot of problems for herself and her kids. But she doesn’t mind because her kids have become great. Chua says, like her, most Asian mothers are tigers because they believe their children can achieve a lot if they’re pushed hard enough. She says American mothers are really cats. They care more about their children’s self-respect (自尊). They don’t want to be strict with their kids because this may hurt their feelings. With soft words and understanding, they encourage their children to choose for themselves. So is a tiger mom better than a cat mom? It may also depend on the child.

小题1:The writer of this passage wants to  _________.

A.tell that Tigers are terrible animals, but a cat is a cute animal.

B.tell us Amy Chua how to give children education.

C.tell the book Battle Hymn of the Tiger Mother is about animals.

D.tell that most Asian mothers are cats小题2:What does Amy Chua think of training a child’s talent?

A.She says that being strict is the only way to train a child’s talent

B.She says that being soft is the best way to train a child’s talent

C.She says that teaching is the only way to train a child’s talent

D.She says that making the rules is the only way to train a child’s talent小题3:To begin with, her kids weren’t allowed to

A.watch TV.

B. play computer games

C.“ hang out ” with other kids after school.

D. Above of all小题4:She doesn’t mind because her kids have become great.  does  she?

A.Yes, she does

B.No, she doesn’t

C.Yes, she doesn’t

D.No, she does.小题5:From the passage, we can know which one is Not true

A.most Asian mothers are tigers because they believe their children can achieve a lot.

B.American mothers don’t want to be strict with their kids because this may hurt their feelings

C.So is a tiger mom better than a cat mom? It may also depend on the child.

D.American mothers are like cats. They care less about their children’s self-respect (自尊).

单项选择题