问题 单项选择题

工件经处理后可获得较高的力学性能,不仅强度较高,而且塑性、韧性更显著超过其他热处理工艺,主要用于重要结构零件的调质处理,此种热处理方法为()。

A.高温回火

B.中温回火

C.正火

D.去应力退火

答案

参考答案:A

解析:本题考查的是焊接热处理。主要用于重要结构零件。钢经调质处理后不仅强度较高,而且塑性、韧性更显著超过正火处理的情况。参见教材P89。

选择题
阅读理解

阅读表达。

    阅读短文,并按照题目要求用英语回答问题.

     It's a fine line parents walk as they try to guide their kids into adulthood. You want to protect but not

treat too kindly, advise but not control and let them live their own lives-with some input, of course.

     If your child asks you to tie a particular hardtotie knot(绳结)for a project she is working on,just tie

the knot. Don't start helping with the rest of the project or making suggestions on how to do it. She wants

to do it herself, in her own way. Before offering help or advice which your child has not asked for, count

to ten. Perhaps in those seconds you'll decide that the advice would do no good,or isn't really that

important,and you'll drop it. If the advice still seems important, you will give it,but the pause may lead you

to give it in a more thoughtful way.

    Remember that your child is not you and is not a reflection of you. We make a serious mistake if we

try to shape our children into copies of ourselves, or if we think of them as extensions or reflections of

ourselves. We need to help them to be them, not try to turn them into us or into something that we think

will make us look good.

     Our primary responsibility to our children is not that of telling them momenttomoment or daytoday

how to behave but providing them with a healthy environment in which to develop. For example, one of

the best ways you can help your kids is to work with your community to create safeenough outdoor

places to play in your neighborhood.

1. What's the best title of this text? (No more than 10 words)

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2. What is the primary responsibility of parents to their children?(No more than 10 words)

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3. What is the meaning of the underlined word "reflection" in Paragraph 3?(No more than 5  words)

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4. Make a list of three mistakes that we parents usually make in guiding the kids.(No more than 20 words)

(1)________________________________________________________________________

(2)________________________________________________________________________

(3)________________________________________________________________________

5. What should a parent do when his/her child asks for help or advice according to the passage?(No more than 15 words)

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