严禁物品伸出吊笼外。特殊需要时，不一定要有()。
A、批准手续
B、安全措施
C、安全员监督
D、维修工在场
参考答案：D
It looks like the weather is changing for ______. Shall we stick to our plan?
A．the worse
B．worse
C．the worst
D．worst
金属工艺焊接性
It looks like the weather is changing for ______. Shall we stick to our plan?