为什么《规程》规定，生产水平和采区必须实行分区通风？
参考答案：由于并联通风经济、安全、可靠，所以《规程》规定，生产水平和采区必须实行分区通风。
The doctor told Mary to eat _____ vegetables and _____ meat because she was getting fatter and fatter. [ ]
A. much; little
B. more; less
C. many; few
D. more; fewer
隐匿性肾小球肾炎
