问题 选择题

下列叙述正确的是(  )

A.100mL酒精和100mL水混合,体积等于200mL

B.稀释浓硫酸时,应将浓硫酸慢慢倒入盛水的量筒中并搅拌

C.打开汽水瓶盖时,有大量气泡冒出,说明气体的溶解度随压强的减小而减小

D.可用托盘天平准确称量15.58g碳酸钠固体

答案

A、100mL酒精和100mL水混合,体积等于200mL,说法错误,体积应小于200mL,故A错误;

B、稀释浓硫酸时,应将浓硫酸慢慢倒入盛水的“量筒”中并搅拌,操作错误,应在“烧杯中”,故B错误;

C、打开汽水瓶盖时,有大量气泡冒出,说明气体的溶解度随压强的减小而减小,说法正确,故C正确;

D、可用托盘天平准确称量15.58g碳酸钠固体,说法错误,故D错误.

故选C.

单项选择题
阅读理解

If practicing an attitude of gratitude(感激) during the storms of life is too much for you right now, that’s OK. When things are tough, most people have a hard time being thankful. They’re so caught up in what’s wrong in the present moment that they simply can’t see some things are still right.

If that’s true for you, then accept it. You’re going through a particularly difficult or unhappy period of time, and you don’t like it one bit. Very normal, very human. But remember this: there is always something to be grateful for. It maybe only a small comfort right now, but it is a start. Make a list of some of the terrible things that didn’t happen. For example:

●You’re in debt...but you’re not homeless.

●You lost your job...but you didn’t lose your health.

●You broke your leg...but you didn’t break your neck.

●Your mother has Alzheimer’s disease...but your father doesn’t.

No matter how bad things are, they could always be worse. Start finding gratitude for what might have happened, but didn’t. It does help a lot. Of course, you may not be thankful for everything— but you can always be thankful for something.

小题1:The passage is intended for those who ________.

A.have done a lot for others

B.have met with difficulties in life

C.have something to do in return

D.don’t know how to be thankful小题2:The writer thinks it ______ for people to feel unhappy in time of difficulty.

A.understandable

B.necessary

C.impossible

D.helpful小题3:How many “terrible things that didn’t happen” are listed in this passage?

A.Two.

B.Three.

C.Four.

D.Five.小题4:What is the purpose of this passage?

A.To discuss ways to make a list of terrible things.

B.To explain what is gratitude towards the storms of life.

C.To persuade people to be thankful for what didn’t happen.

D.To show people different ways to consider their tough situations.小题5:How is the passage organized?

A.Explanation—Comparison—Topic

B.Argument—Opinion—Discussion

C.Comparison—Argument—Explanation

D.Introduction—Discussion—Conclusion