扫孔内岩芯或扩孔时,不得开车(),以防扭断钻杆或损坏钻头。
A、过慢
B、过猛
C、均速
参考答案:B
根据上下文和首字母提示写单词完成短文。
I 1.a______ Bob.This 2.i ______Mary. She is a 3.g______.She' is my good 4.f______ .
She is 5.n______years old. We are in the same 6.s______ She has a happy 7. f______.
There are 8. f people in her family. Her 9. p______ ,her brother, her sister and she.
10. H______mother is teacher. Her,11. f______ is a worker. Her brother and her sister
12. a______ very young
13. How old is Mary?
_______________________________
14. Is Mary's mother a worker?
防抱死制动系统的缩写为()。
A.ABS
B.ASR
C.CVT
D.TCS