题目内容
【题目】已知集合A，B，若A不是B的子集，则下列命题中正确的是
A．对任意的a∈A，都有aB
B．对任意的b∈B，都有bA
C．存在a0，满足a0∈A，a0B
D．存在a0，满足a0∈A，a0∈B
【答案】C
【解析】A不是B的子集，也就是说A中存在某个元素不属于B，显然正是C选项要表达的．对于A和B选项，取A＝{1,2}，B＝{2,3}可否定，对于D选项，取A＝{1}，B＝{2,3}可否定．
作业辅导系列答案【题目】
When difficult people express themselves orally, they generally want at least two things: they’ve been heard and they’ve been understood. As a good communicator should be a good listener, five steps are advocated toward good listening.
The first step is cooperating( 合 作 ).How does a difficult person know that you’re listening and understanding? In fact, it’s through the way you look and sound while he is talking. You may help him to fully express his thoughts and feelings. You do this by nodding your head in agreement, making certain sounds of understanding.
When the person begins to repeat what’s been said, it’s a signal of step two: turning back. It means that you repeat some words he is using, sending a clear signal that you’re listening carefully and that you think what he is saying is important.
Having heard what he has to say, the next step is clarifying. At this point, you start to gather information about what is being communicated. Ask same open-ended questions, which will allow you to figure out what intention he is hoping to satisfy.
The fourth step is to summarize(概括)what you’ve heard. This allows you to make sure that both you and the difficult person the same page. When you do this, two things happen. First, if you’ve misses something, he can fill in the details(细 节).Second you’ ve shown that you’ re making an effort to understand completely. This increases possibility of gaining cooperation from him.
Having listened carefully, you’ve now arrived at the point of confirming with the person that he feels satisfied that this thoughts have been fully voiced. Ask if he feels understood.
Then enough sincere listening, questioning, and remembering are brought together, understanding is usually achieved and a difficult person becomes less difficult and more cooperative.
根据短文内容完成下列表格。
Topic | 【1】 to understand |
Reason | Difficult people hope they have been heard and【2】 when they express themselves. |
【3】 on listening | ◆【4】 in agreement and make some sounds of understanding while a difficult person is speaking. ◆Repeat some【5】 that you have heard. ◆Collect information about the person ’ s expressions and find his【6】 . ◆Give a【7】 of what the person has said. ◆Confirm that the person gains【8】 from speaking his thoughts. |
Result | A difficult person will be【9】 to cooperate with if understanding is achieved. |
Comment | You may unlock the doors to difficult people’ s【10】 after you listen and understand. |