拓扑信息_爱下问搜题

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问题名词解释

拓扑信息

答案

参考答案：是指构成物体的各个分量的数目及相互之间的连接关系。

完形填空

We are lucky to live in a rich country where we have many things. However, most of us usually   some things.
Electricity is one thing that we waste ____. Lights, TVs,    and other things are often kept on even when no one is using them. We should turn them off when we do not need them. It        less than a second to do it. Anyhow, not wasting electricity save money, because we do not have to        the electricity we do not use.
The second thing that we often waste is water. Fresh water is precious(宝贵的)，      it shouldn’t be wasted.It is only a simple matter of turning off a tap*. I am sure        can do this easily if he wants to.
      big waste is food. My mother        cook so much food that much of it was thrown away. I told her we had wasted so much       . She thought I was right and now cooks __   _ what we can eat.
It is not         to be wasteful. I find there is a simple       of not wasting things. That is to use only what we        . Do not touch what we do not need.         this way we can stop being wasteful.

C．was able to

D．was afraid to

A．electricity

多项选择题

旅游态度的特征有（）

A.情感性

B.可变性

C.对象性

D.稳定性