厂房内悬挂的溜槽,管道及电缆高度应不低于()m
A、1.5
B、2
C、2.5
参考答案:B
---Hi, Jane, tell you a piece of good news. I _____ America tomorrow.
---Wow, have a good trip!
A. will leave to B. leaves for C. am leaving for
省煤器入口给水管道上的止回阀不()会引起给水的惯性冲击。
A.正常地跳动
B.启动
C.关闭
D.打开