【判断题】蜗杆头数越少,传动比越大,不容易自锁,效率越低。
【单选题】—Excuse me,could you please your cigarette? ——Sorry, I won’t.
【单选题】We will put off the trip until next Friday, when we won't be so bus.
A.
我们把旅行推迟到下星期五,那时我们不会这么忙。
B.
等我们不太忙的时候我们就把旅行推迟到下星期五。
C.
只有在下周五不太忙时,我们才能去延迟了的旅行。
【单选题】The students will put off the outing until next week, ______they won't be so busy.
【单选题】Lucy, could you please help me ____ the map on the blackboard? We won't need it. [ ]
【简答题】台帽放样时,应注意不要以 线作为台帽 线,浇筑前应反复核实。