目前在干线客机上最广泛采用的启动机是（）.
A.电动启动机
B.冲击启动机
C.空气涡轮启动机
D.燃气涡轮启动机
参考答案：C
---A stranger gave me an umbrella when I was caught in the rain.
---________.
A．First impression is half the battle
B．A friend without faults will never be found
C．There is kindness to be found everywhere
D．Two heads are better than one
某牛奶加工厂厂10kV供电、受电变压器容量为315kVA，其用电应执行什么电价？
