驱绦虫首选（）
A.贯众
B.雷丸
C.槟榔
D.乌梅
E.苦楝皮
参考答案：C
The river is very long and it is about _____. [ ]
A. 20 metres wide
B. 15 metres long
C. 30 metres high
D. 50 metres tall
人源化抗体的最主要优点是
A．亲和力强
B．纯度高
C．异源性低而有利于应用于人体
D．稳定性好
E．特异性强
