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问题 单项选择题

对过热器、再热器防爆检查应重点检查管子有无下列情况：（）、烧损减薄、胀粗、表面裂纹、氧化皮厚度、膨胀受阻和管子乱排。

A、磨损或吹损减薄

B、腐蚀

C、砸伤凹痕

D、变形

答案

参考答案：B

填空题

单词拼写

1. Sad to say, this s       resort was formerly as beautiful as a painting, but now is overcrowded with

people.

2. The d       of these big forests could have serious ecological consequences.

3. I don't f       going out so far away in such bad weather.

4. Many people claimed they had seen this kind of bird, but in fact it had d       for millions of years.

5. Long skirts have come into f       again this year, so girls dressed in long skirts can be seen everywhere. 6. After three days' marching, we reached our       (目的地) at last, tired and hungry.

7. Last month a new       (地点) for our new school was chosen.

8. This       (人造的) leather feels like the real thing.

9. Schools must try to make science more      (有吸引力的) to youngsters.

10. Television, Internet and radio all give us everyday      (娱乐).

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单项选择题

下列（）措施不能增强箱体零件的刚度。

A.选用完全封闭或仅一面敞开的空心矩形截面及采用斜肋板等较好的结构

B.采取尽量减少与其它机件的联接面数

C.使联接面倾斜于作用力

D.尽显减小机座和箱体的内应力以及选用弹性模量较大的材料
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