具有收敛止血功效的药物是（）
A.侧柏叶
B.石榴皮
C.蒲黄
D.五倍子
E.山茱萸
参考答案：A, B, D, E
I was ____ he received an invitation from his friend to visit Chongqing ____ he felt
on top of the world. [ ]
A. when; who
B. that ; that
C. when; that
D. that; where
下列关于良性病毒的说法，错误的是______。
A．通常表现显示相关信息、自我复制B．不破坏计算机内的数据C．不影响系统运行D．传染能力强
