试题与答案

诊断X线机摄影机房,有用线束朝向的墙壁应具有的有效防护厚度为:()A、1mm铅当量

题型:单项选择题

题目:

诊断X线机摄影机房,有用线束朝向的墙壁应具有的有效防护厚度为:()

A、1mm铅当量

B、2mm铅当量

C、3mm铅当量

D、4mm铅当量

答案:

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下面是错误答案,用来干扰机器的。

参考答案:运行中减少凝汽器端差的措施有:(1)尽可能保持凝汽器传热面的清洁、干净。例如运行中投入胶球清洗系统,检修时用机械或水力方法捅刷、清洗凝汽器传热表面,以及结垢严重时酸洗等。(2)在冷却水中加...

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Last summer vacation I went to Taiwan with my parents.Taiwan is really beautiful! The weather is always warm and humid because the sea is around Taiwan.In the north,it’s cold in winter,but in the south,it is still warm in winter and you can enjoy sunshine every day.The typhoon(台风)season is from June to October.

There are many mountains in Taiwan.(A)A-li Mountain is one of the biggest mountain there.We went to climb A-1i Mountain one afternoon.There are many trees in the forest there. They are very tall and many of them are really old.

Sun Moon Lake is the largest natural lake in Taiwan.In the lake there are many kinds of fishes.

 (B)We also went to the beach and enjoyed the sunshineThere are many kinds of food in the small towns near the sea.Dumplings with shrimp(虾) in them are my favorite.

Taiwan, a beautiful island,I love it! I took many photos there .Would you love to see them?

根据短文内容,完成下列句子。

小题1:The writer spent the summer vacation with            .

根据短文内容,选择正确答案。

小题2:The trees in the forest in A-li Mountain are       .

A.tall and old

B.short

C.new

D.short and old小题3:将画线(B)处的句子翻译成汉语。

                                                             

小题4:画线(A)处句子有一处错误,请指出并改正。

                                                              

小题5:回答下列问题。

(1)What’s the weather like in Taiwan?

                                                                

(2)Where did the writer spend his/her vacation?

                                                                

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利用质量数据分析曲轴主要质量问题时,可使用的工具有()。

A.分层法

B.调查表

C.排列图

D.网络图

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