广谱驱虫药是（）
A.南瓜子
B.使君子
C.苦楝皮
D.川楝子
E.青蒿
参考答案：C
一只蜂鸟约重2.1克，2.1里面有______个0.1．
Whenever an earthquake happens, we should offer ________ help we could, to those victims.[ ]
A. however
B. whenever
C. whatever
D. whichever
