施工单位在采用( )时,应当对作业人员进行相应的安全生产教育培训。
A.新技术
B.新工艺
C.新方案
D.新设备
E.新材料
参考答案:A,B,D,E
---What is our earth like ________from the moon?
---Well, our earth, with water ________ 70% of its surface, appears as a "blue ball".
A.seen; covering
B.seen; to cover
C.seeing; covered
D.seeing; covering
夏天的早上会看到草叶上有一些露珠,这是______现象;冬天的早上会看到窗户的玻璃上结有一层霜,这是______现象.