大多数植物生长所需营养液浓度的适宜值为（）Ms/cm。
A、>2
B、2-0.9
C、0.9-0.6
D、<0.6
参考答案：C
–There is thick haze(雾霾)around many cities in China recently. What do you think of it ?
---I think __________ cars we drive, the less pollution the city has.
A．the less
B．the fewer
C．the more
D．tyhe faster
NO7信令链路指标中，链路闭塞率的公式为BSC闭塞链路数/信令链路可用数。（）
