功能杀虫消积，行气利水截疟的药物是（）
A.南瓜子
B.牵牛子
C.槟榔
D.川楝子
E.苦楝皮
参考答案：C
The difference in thickness and weight from the earlier version makes the iPad 2 more comfortable ____ . [ ]
A. held
B. holding
C. be held
D. to hold
简述合同权利转让的原因和应具备的要件。
