问题 问答题

(1)空气是一种宝贵的资源.______能支持动植物呼吸,在医院里常用于急救危重病人;稀有气体在通电时能发出不同颜色的光,可制成多种用途的电光源,如:______(填一种电光源即可).

(2)使用天然气(主要成分是甲烷)作家用燃气,利用甲烷的化学性质是______.氧化铝常用来制造耐高温的实验仪器,利用氧化铝的物理性质是______.

答案

(1)氧气能支持动植物呼吸,在医院里常用于急救危重病人;稀有气体在通电时能发出不同颜色的光,可制成多种用途的电光源,如霓虹灯、航标灯等.

(2)天然气(主要成分是甲烷)作家用燃气,是利用了天然气的主要成分甲烷的可燃性;氧化铝常用来制造耐高温的实验仪器,是利用了氧化铝耐高温的性质.

故答案为:(1)氧气;霓虹灯;(2)可燃性;耐高温.

单项选择题
完形填空

    61    Being angry doesn’t really solve much, but what people do when they feel angry is important. The goal is to calm down and try to solve what is bothering you. This is hard for some kids and adults, too. Instead of calming down, some kids might keep getting more and more upset until they explode like a volcano!

   62    Their anger might be so strong that they lose control of their temper. They may act in ways unacceptable and hurtful. People may say that someone has trouble controlling their temper.    63   

Some kids might get so angry that they scream at their parents, break something, or even worse, hit their brothers and sisters.    64    However, it’s not OK for a kid to do any of those things. Kids don’t want to act in this way, but sometimes angry feelings can be hard to manage. So what to do?

Well, the good news is that kids don’t just have to keep making the same mistakes over and over again.    65     Imagine your temper as a puppy inside you that needs some training. The puppy is not bad-it will probably turn out a great dog. It just needs to learn some rules because, right now, that puppy is causing some problems to you.

You can train your temper.

You don’t want to cause trouble.

Kids should be allowed to express their feelings, even angry ones.

Everybody gets angry sometimes.

In fact, they usually mean that a kid behaves badly when feeling angry.

Instead of thinking of the person you are angry with, think of something else.

Some kids get angry more often or more easily than some others.