凝汽器水位升高有什么危害?

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问题:

凝汽器水位升高有什么危害?

考点:发电工(动力工)发电工(动力工)题库
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下列说法中,正确的是(  )

A.有最大的负数,也没有最小的正数

B.没有最大的有理数,也没有最小的有理数

C.有最大的非负数,没有最小的非负数

D.有最小的负数,没有最大正数

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阅读下面短文并用英语回答问题,然后将答案写到答题卡相应的位置上(请注意问题后的词数要求)。

[1]When children go to camp, they are on their own ,sometimes for the very first time in their lives, They have to decide what to wear, what to eat and which activities to participate in ,As a result they develop confidence and independence.

[2]As self-respect develops from learning to be on their own ,children continues to try new activities, Also it is possible that they will engage in what they are unfamiliar with, In school, children do not experience success in the same way, Camp can be a school without failure because just having fun makes them a success.

[3]One of the greatest benefits of a camp experience is that children develop social skills, In a camp setting , a good counselor will make sure that every camper is included in the activity and that each child interacts with the others in a positive way, They learn to give and take, and they learn how to work and cooperate, Something as simple as clean-up, is not only there to get the cabin clean, but to promote a team atmosphere of working together which in turn results in friendship.

[4]The obvious benefit of camp is that campers make long lasting friendships, These friendships can often be unique and special because campers are living with each other and see

The true personalities, Children learn to see others from a different viewpoint ,Children tend to be accepted for who they are and to not have to be concerned about what they wear, what they are good at and how they look, This is because in a camp setting , respect and caring finally win out over materialistic objectives.

[5]In a word ,camp does give children fun ,friends and fulfillment .

小题1:What is the passage mainly about?(No more that 10 words)

                                                                           

小题2:The underlined phrase “on their own” in Paragraph I can be replaced by           .

(No more than one word)

                                                                            

小题3:According to Paragraph 2 , what makes camping different from a school?(No more than 10 words)

                                                                            

小题4:What is the main idea of Paragraph 3 ? (No more than 10 words)

                                                                            

小题5:According to Paragraph 4 , why can camping improve friendship?(No more than 15 words)

                                                                            

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塑化治疗不宜用于

A.狭窄、弯曲根管

B.成人下颌磨牙

C.成人上颌磨牙

D.老年人下前牙

E.年轻恒牙

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烟熏方法有直接烟熏法和()烟熏法,若按温度分,则可分为冷熏、温熏、热熏、焙熏和()等。

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反应烧结

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