城市环境容量的类型包括( )。
A．城市温湿环境容量
B．城市人口容量
C．城市大气环境容量
D．城市交通环境容量
E．城市水环境容量
参考答案：B,C,D
— Flight CA 581_____. I must be off now.
— Have a nice trip.[ ]
A. is being announced
B. has announced
C. was announcing
D. will be announced
被公认为是开行政学研究之先河的先驱者。
