当楼板底部______(如肋梁楼板)而房间又要求______或在楼板底部需隐藏______等三种情况下,应设吊顶。
参考答案:不平;平整;管道以及房间隔声要求较高
I would rather you ______ my advice. Now you’ve got a bad result. It serves you right.
A.took
B.would take
C.had taken
D.take
装配图的作用有哪些?如何识读装配图?