His uncle often _______ a walk after supper. [ ]
A. take
B. have
C. takes
D. to take
答案:C
铺设室外给水管道时,金属管道的覆土深度一般不小于______m。
A.0.1
B.0.5
C.0.7
D.1.0
面向胶带运行方向,当胶带向左跑偏时,可将托辊左端向前摆或将()端向后摆当胶带向右跑偏时,可将托辊右端向前摆或将左端向后摆。
A.左
B.右
C.前
D.后