【简答题】---Did you have any trouble in getting there? ---No. _____ I would have telephoned you. A. However B. Otherwise C. Therefore D. Anyway
【单选题】How long ______ you ______ here since you ______ to Beijing? [ ]
D.
have; lived; have come
【简答题】车站应不间断地接发列车,严格按什么行车?
【单选题】当孔的下极限偏差大于相配合的轴的上极限偏差时,此配合性质是 。
【判断题】企业与消费者之间的电子商务是B2G。( )
【单选题】当孔的下极限偏差大于相配合的轴的上极限偏差时,此配合性质是( )
【单选题】企业与消费者之间的电子商务,是以下( )