The computer was used in teaching. As a

撒哈拉以南的非洲分布面积最广的气候是[ ]

A．热带雨林气候

B．热带草原气候

C．热带沙漠气候

D．热带季风气候

苏州太湖以风景优美闻名遐迩，近年来太湖受到了一定的污染，为了改善太湖水质，你认为不合适的措施是 ①随意丢弃废旧电池 ②生活污水排入太湖 ③将生活垃圾倒入护城河内或就地焚烧④工业废水经处理后循环使用 [ ]

A．只有①②

B．只有②③

C．只有①④

D．只有①②③

—They started working on the show two months ago, didn’t they?

—___________. A lot of work needed to be finished before the show.

A．Yes, they did

B．No, they didn’t

C．Yes, they didn’t

D．No, they did

碳素沸腾钢板和Q235-A钢板不得用于制造按GB150或容规管辖的压力容器。

调车用的铁鞋、鞋叉、安全带、调车灯（旗）、无线调车设备等调车工具下班时要随身带走，保证质量要完好，数量正确。