单项选择题

导墙顶面应高于地面( )mm。 A.
50 B.
100 C.
150 D.
300

你可能感兴趣的试题

In the natural or social science arena, risk is often viewed as an index of ‎
the and the chances it will adversely affect people or the environment.‎

答案： severity of harm

单项选择题

将JK触发器的两个输入端J、K连在一起，可以构成T触发器。
A、正确
B、错误