【单选题】Mr. Pontetlier felt extremely frustrated because______.
C.
his wife was indifferent to his talk
D.
his wife showed too much interest in his talk
【多选题】切削用量三要素是金属切削加工中非常重要的参数,它们直接影响:
【单选题】When Henry arrived home after a hard day at work, his wife was slept.
D.
his wife has been sleeping
【判断题】[判断题] 创业是不拘于当前资源约束、寻求机会,将不同的资源以利用和开发,并创造价值的过程。()
【单选题】[机械设计部分][中职和高职和教师][难] 双曲柄机构机架长度为50mm,两连架杆长度分别为100mm和150mm,则连杆长度L的取值范围是 ( )