既能活血化瘀，行气解郁，又能利胆退黄的药物是（）
A.柴胡
B.金钱草
C.丹参
D.虎杖
E.郁金
参考答案：E
The restlessness of animals _____ a possible occurrence of an earthquake. [ ]
A. expressed
B. impressed
C. indicated
D. announced
在用闭口杯测定变压器油的闪点时，试油的水分大于（）时必须脱水。
A.0.0001
B.0.0002
C.0.0005
D.0.001
