问题 选择题

NaOH、KOH等碱性溶液可以贮存在下列哪种试剂瓶中

A.具有橡胶塞的细口瓶

B.具有玻璃塞的广口瓶

C.带滴管的滴瓶

D.具有玻璃塞的细口瓶

答案

答案:A

题目分析:固体药品一般放在广口瓶中,液体试剂一般放在细口瓶中。NaOH、KOH等碱性物质的溶液容易与玻璃中的成分SiO2发生反应:2OH -+SiO2= SiO32-+H2O。产生的Na2SiO3、K2SiO3有粘性,容易将玻璃瓶与玻璃塞黏在一起。所以NaOH、KOH等碱性溶液可以贮存在具有橡胶塞的细口瓶中。选项为:A。

阅读理解

阅读短文,选择正确答案。

     When a terrible earthquake hit, many people were killed and many houses fell down. After the earthquake,

all the newspapers reported many stories about some of the families who were in trouble.

     One Sunday, when I was reading a newspaper, a special picture touched me. It gave the clothing sizes of

each family member. I thought that this would be a good chance to teach my children to help those who were

less lucky than themselves. I said to my seven-year-old twins, Brad and Brett, and three-year-old Meghan. "We

have so much, and these poor people now have nothing. We'll share what we have with them.”

     I filled a box with foods and clothes. While I was doing this, I encouraged the boys to choose their toys and

donate some of their less favorite things. Meghan watched quietly as the boys took out their old toys and games

and put them together. Then she walked away. A few minutes later she came back with Lucy, her much-loved

doll. She put the doll on top of the other toys. "Oh, dear," I said. "You don't have to give Lucy. You love her so

much." Meghan said, "Lucy makes me happy, Mommy. Maybe she'll make another little girl happy, too." 

     I looked at Meghan for a long moment. She taught me a lesson. It's easy to give something that we don't

want any more, but harder to give what we cherish (珍爱), isn't it?

1. The writer has _______ children.

A. one

B. two

C. three

D. four

2. The underlined word "donate" Probably means _______.

A. 捐赠

B. 丢掉

C. 展出

D. 放好

3. Lucy is the name of _______.

A. a girl

B. a game

C. a doll

D. an earthquake

4. Which of the following is true?

A. An earthquake happened in the writer's hometown.

B. The writer didn't let Meghan give her much-loved doll.

C. The writer decided to buy some clothes for those people in trouble.

D. The writer thinks it is more difficult to give what we love a lot.

5. What's the best title of this passage?

A. A Family Story.

B. The Spirit of Giving.

C. The way of helping others.

D. A Sad Experience.

单项选择题 A1/A2型题