发生火灾时,下列哪个信号具有最大优先权()。
A.背景音乐
B.寻呼找人广播
C.消防广播信号
D.环境广播
参考答案:C
图为“三江平原水循环简图”。读图回答下列各题。
小题1:图中缺少的水循环环节是
A.降水
B.地下径流
C.蒸发
D.水汽输送小题2:图标区域由“北大荒”变为“北大仓”,受人类活动显著影响的水循环环节有
A.①②④
B.②③⑤
C.①③④
D.②④⑤
— What do you think of teaching, Bob?
— I find it fun and challenging. It is a job _____ you are doing something serious but interesting. [ ]
A. where
B. which
C. When
D. that