【简答题】We get (clever)______ as we get older.
【单选题】We all know that, _____ , the situation will get worse [ ]
A.
if not carefully dealt with
B.
not if dealt carefully with
C.
if don't deal with carefully
D.
not if carefully dealt with
【单选题】Once we get these problems straightened ________, we should be all right.
【简答题】铰链四杆机构按曲柄存在的情况,可分为 机构、 机构和双摇杆机构三种基本形式。
【多选题】铰链四杆机构按曲柄存在的情况,分为()三种基本形式