问题 选择题

下列叙述正确的是

A.熔点由高到低的顺序是:金刚石>碳化硅>晶体硅

B.分子晶体中,分子间的作用力越大,该分子越稳定

C.油脂皂化后可用渗析的方法使高级脂肪酸钠与甘油充分分离

D.布朗运动是胶体粒子特有的运动方式,可以据此把胶体和溶液、悬浊液区别开来

答案

答案:A

A正确,金刚石比晶体硅原子半径小,碳和碳之间的作用力大,熔点高,碳化硅居中。

阅读理解

Continuing from the previous post 6 reasons to improve your body language, here is just a few of many pointers on how to improve your body language. Improving your body language can make a big difference in your people skills, attractiveness and general mood.

There is no specific advice on how to use your body language. What you do might be interpreted in several ways, depending on the setting and who you are talking to. You’ll probably want to use your body language differently when talking to your boss compared to when you talk to a girl/guy you’re interested in. These are some common interpretations(解释,诠释) of body language and often more effective ways to communicate with your body.

First, to change your body language you must be aware of your body language. Notice how you sit, how you stand, how you use you hands and legs, what you do while talking to someone.

You might want to practice in front of a mirror. Yeah, it might seem silly but no one is watching you. This will give you good feedback on how you look to other people and give you an opportunity to practise a bit before going out into the world.

Another tip is to close your eyes and visualize how you would stand and sit to feel confident, open and relaxed or whatever you want to communicate. See yourself move like that version of yourself. Then try it out.You can also take bits and pieces you like from different people. Try using what you can learn from them.

小题1:According to the passage, the improved body language can ______.

make people charming

make people encouraged

make people disappointed

make people interested

小题2:From paragraph 2, we can learn that ______ will depend on how to use your body language.

some specific advice on how to use your body language

the backgrounds and the person who you are communicating with

the way a person communicate with other people

the mood of the person who you are communicating with 

小题3:If a person wants to change his body language when he is talking, he must ______.

pay attention to others’ postures

pay attention to his own hands and legs

pay attention to his own body language

pay attention to his own language

小题4: When a person practise his body language, he can ______ .

improve his body language in public

treat others body language well

make himself appear silly and funny

make himself become confident

小题5:Maybe a person can’t behave well in public until he ______ .

imitate different famous peoples ’body language

imitate others’ body language without any change

close his eyes to imagine his body language

close his eyes to imagine and practise his body language

单项选择题