离合器在使用中，不按要求正确使用会影响摩擦片的使用寿命。
参考答案：对
My sister met him at the Grand Theatre yesterdays afternoon, so he ________ your lecture.[ ]
A. couldn't have attended
B. needn't have attended
C. mustn't have attended
D. shouldn't have attended
轮捕轮放的含义？
