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问题 选择题

下列变化中，必须加入氧化剂的是（　　）

A．CuO→Cu

B．CO2→CO

C．O2→H2O

D．Cl-→Cl2

答案

题中A、B、C中Cu、C、O元素化合价分别降低，应加入还原剂，D中Cl元素化合价升高，被氧化，应加入氧化剂，

故选D．

阅读理解

阅读理解。

     One day a little girl goes shopping (购物) with her mother. They wait (等) for the bus to take them to the

store. When the bus comes, the mother takes some money out of her bag and buys the tickets (票). They sit

down and look out of the window. They see some cars and a lot of people. The bus takes them to the store.

They buy some new shoes and sweaters. They also buy nice hats. Then they go back on the bus and get home

at 4:00pm.

1. Where does the girl go one day?

A. To a hospital.

B. To a party.

C. To a club.

D. To a store.

2. Who does the girl go there with?

A. Her friends.

B. Her mother.

C. Her sister.

D. Her aunt.

3. How do they go there?

A. By bike.

B. By car.

C. By bus.

D. On foot.

4. What do they buy there?

A. Shoes.

B. Shoes and sweaters.

C. Shoes, sweaters and hats.

D. Nothing

5. The underlined word (划线单词)"money" means _______ in Chinese.

A. 钱

B. 书

C. 手帕

D. 化妆品

查看答案
单项选择题

以下哪种药物不是便秘用药（）

A.麻仁胶囊

B.润通丸

C.番泻叶

D.木香顺气颗粒
查看答案