下列选项，属攻毒杀虫止痒药的是（）
A.雄黄
B.丹参
C.蟾酥
D.大蒜
E.硼砂
参考答案：A, C, D
—How was the 2008 Beijing Olympic opening ceremony?
—________ that the whole world was attracted.
A．It was very fantastic
B．Such fantastic was it
C．So fantastic was it
D．So fantastic it was
以下各特点中属于算法的基本特征的是( )。
A．不可行性
B．确定性
C．拥有部分的情报
D．无穷性
