焊料焊接中，焊料具有向温度高处分流布的特点，这是因为（）

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问题单项选择题

A.温度高焊媒的流动性降低

B.温度高焊料的熔点而随之提高

C.温度高可降低焊料的表面张力，改善润湿性

D.温度高焊料的熔点会降低

E.温度高被焊金属氧化快

答案

参考答案：C

填空题

Most "unassertive" people are not confident and take no for an answer much too easily. There is a growing awareness in our society that this tendency (1) the rights of large numbers of people. For example, in recent years there has been an upsurge in (2) and pressure groups. This is a (3) as there will always be a need for such organizations to (4) individuals and minorities in a competitive society. The danger is that we (5) for our rights and lose the art of asserting ourselves. It is better for (6) with other people if you can learn (7) for yourself.
Now, we have to learn to ignore some of the (8) that may be ringing in our unconscious minds, such as: "If you ask once more, I’ll flatten you", and " (9) ".
The main technique that we use in (10) to practice the art of persistence is called Broken Record. (11) we hear one sentence over and over again until we reach screaming pitch and (12) .
Broken Record is the skill of being able to repeat over and over again, (13) , what it is you want or need, until the other person gives in or (14) .
Now, this technique is extremely useful for dealing with situations where your rights are clearly (15) , or coping with situations where you are likely to be diverted by clever, (16) .
The beauty of using Broken Record is that you (17) because you know exactly what you are going to say, however (18) the other person tries to be.
As with most assertive techniques, it must be used appropriately. It is (19) and is not designed to foster deep, interesting conversations and friendships with people! It is primarily of use in situations where (20) .

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单项选择题

新生儿黄疸于生后24小时内出现者首先考虑

A．新生儿肺炎

B．新生儿败血症

C．新生儿肝炎

D．新生儿溶血症

E．先天性胆道闭锁

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