【判断题】良好的润滑可以减少齿轮的齿面点蚀和胶合现象的发生。
【单选题】What do we know about the man?
A.
He usually drives to school.
B.
He can ride the woman's bike to school today.
C.
He won't be late for school today.
【单选题】Jim can drive a car, ________ he can’t ride a bike. [ ]
【单选题】“ 诗无达诂 ” ,可以简明地概述( )的观点 。
【判断题】沙门氏菌属于细菌性食物中毒中最常见的致病菌。 ()