附属于烟囱架的之字型马道，宽度不得小于1m，坡度为1∶3，脚手板应绑牢并加钉防滑条。
参考答案：对
In my point of view, the question is not _____ the world is going to have a new economic crisis, but when.
A．that
B．how
C．what
D．whether
小脑幕切迹中通过的是( )
A．延髓B．中脑C．脑桥D．小脑E．丘脑
