对于开式齿轮传动,()是开式齿轮传动的主要失效形式。
A.齿面胶合
B.齿面磨损
C.轮齿折断
D.轮齿点蚀
参考答案:B
— Lucy, what about going camping if it _____ tomorrow?
— Sounds great! [ ]
A. didn't rain
B. hasn't rained
C. won't rain
D. doesn't rain
在下文横线处填入的词语.最为恰当的一项是( )。问之以是非而观其志,_____之以辞辩而观其变,咨之以计谋而观其_____,告之以祸难而观其_____,醉之以酒而观其_____,临之以利而观其_____,期之以事而观其___()
A.穷,勇,性,廉,信,识
B.穷,识,勇,性,廉,信
C.穷,勇,信,性,识,廉
D.穷,性,识,勇,信,廉