新装变压器投入运行时，应以（）电压进行冲击，冲击次数和试运行时间按有关规定执行。
参考答案：额定
Our English teacher often uses different activities ______ in learning. [ ]
A. keeps us interested
B. keep us interest
C. to keep us interesting
D. to keep us interested
来源于菊科植物的果实药材是
A．酸枣仁 B．木瓜 C．牛蒡子 D．薏苡仁 E．枳壳
