问题 选择题

下列物质属于非电解质的是(  )

A.Cl2

B.CH3COOH

C.C2H5OH

D.Al2(SO43

答案

A、氯气为单质,既不是电解质,也不是非电解质,故A错误;

B、乙酸在溶液中能够电离出醋酸根离子和氢离子,其溶液导电,乙酸属于电解质,故B错误;

C、乙醇不导电,其水溶液也不导电,所以乙醇为非电解质,故C正确;

D、硫酸铝在溶液中和熔融状态下都能够导电,硫酸铝为电解质,故D错误;

故选C.

阅读理解

阅读理解。

    One day in Overtown, Florida, 3.7 million dollars fell from the sky! It happened when a truck turned over.

There was money everywhere! One man said, "The streets were like gold." Some people took off their shirts

and filled them with money.

    Police officers went from door to door in the neighborhood. They asked people to return the money. After

six hours, the total returned: zero.

    No one in Overtown was surprised. Many people in this town are poor. They need the money to buy food

for their children. They think that God sent the money to them.

    The police say this is a serious crime. "People took thousands of dollars. It's not their money, and they have

to return it." The police also say it's dangerous to keep the money because everyone knows the story from the

news. People have money in their pockets and their backyards, and other people will try to steal it.

    So far, only one person has returned some money. He is a firefighter. He found 300,000 dollars in a bag

and gave it to the police. The people of Overtown still have the rest of the money.

1. People filled their shirts with the money from ______.[ ]

A. the sky

B. a truck

C. a bank

D. a shop

2. What does the underlined word "crime" in the fourth paragraph mean in Chinese? [ ]

A. 金钱

B. 犯罪

C. 损失

D. 德行

3. Where did people hide the money they got? [ ]

A. In their kitchens.

B. In their bedrooms.

C. In their backyards.

D. In their sitting rooms.

4. How much money was still missing? [ ]

A. 3.7 million dollars.

B. 300,000 dollars.

C. 3.4 million dollars.

D. 700,000 dollars.

5. Which is the best title for the passage? [ ]

A. Money from the Sky.

B. Police and Money.

C. A Truck of Money.

D. Poor People and Money.

单项选择题