传统药学是要求
A．三日极量B．二日常用量C．二日极量D．三日常用量E．七日常用量
参考答案：C
(2010·上海)Wind power is an ancient source of energy ________ we may return in the near future.
A．on which
B．by which
C．to which
D．from which
当收端连续8次收到AU-PTR的值大于782，则设备会产生（）告警。
