喷丸
参考答案:
用硬而小的球,如金属丸喷射金属表面的过程,其作用是加压强化该表面,使之硬化具有装饰的效果。
第二节:语法填空 (共10小题;每小题1.5分,满分15分)
I have a 12-year-old son who is kind and helpful. And he is showing great interest 26 growing plants. I have been helping him plant flowers, vegetables and just plants in general since spring arrived.
When 27 (plant) a bunch of flowers one Saturday afternoon , I found that there were two flowers 28 (leave) in my son’s basket. My son decided to take them to the little house next door 29 an elderly woman lived by herself and didn’t seem to have much company. I watched him as he went up to her door, rather 30 (hesitant ) because he didn’t know her, and he quietly left the flowers 31 her doorstep so that she would get 32 the next time she went outside.
The next morning we were pleased to find that she 33 (plant) the flowers in a pot by the door. They looked really beautiful. 34 it was a small thing , it was important as my son has learnt to do good for 35 . He said to me, “It feels really good to do things for other people.”
回填灌浆是填充()与()之间的空隙,使之结合紧密,共同受力,以改善()条件和减少()。