焊接按焊接的过程特点可分为()、压焊、钎焊三大类。
参考答案:熔焊
用所给单词的适当形式填空。
1. I don't have __________ (some) homework today.
2. The TV is too __________ (loud).
3. Danny is __________ (play) the piano.
4. Let __________ (I) think.
5. Is Jenny a good violin __________ (play).
6. I play the erhu three __________ (time) a week.
7. Thanks for __________ (help) me.
8. I'm going to __________ (turn) it up.
9. Here are some other __________ (thing) you can do.
10. What did you __________ (like) best?
通过对水下抛石的探摸可了解局部淘刷、走失、坍塌的范围和尺度,并约估()。
A.长度
B.宽度
C.厚度
D.缺失工程量