维护作业计划分拟定、()、执行、检查和考核四个环节。
A、上报
B、传达
C、审批
D、通知
参考答案:C
The students were told to ________ their English before going abroad.[ ]
A.give up
B.use up
C.polish up
D.end up
碗扣式钢管脚手架扫地杆距地高度应小于或等于()。
A.180mm
B.200mm
C.300mm
D.350mm