为什么打眼时不准用手托扶钻杆?
参考答案:
钻杆工作时高速转动,用手托扶会伤到手臂或缠到衣物,一旦钻杆折断,会造成人员伤亡事故;因此打眼时不准用手托扶钻杆。
I like have dinner at home. My mother often cooks ______for me.
A.delicious anything
B.anything delicious
C.delicious something
D.something delicious
The contracts must be renewed one week( )their expiration.
A.on B.againstC.the moment of D.before