矿井中控制风量的设施主要有哪些？
参考答案：包括风门、风桥、密闭、挡风墙、调节风门和风窗等。
建设项目选址确实无法避开基本农田保护区，需要占用基本农田，必须经哪级政府批准( )
A．城市政府B．县级以上(不含县级)政府C．省级政府D．国务院
3. —You had better not judge a person _______his appearance.
—I know all the people dressed _____rags are not beggars.
A．by ; in
B．in; in
C．in; by
D．by; by
