除下列哪种因子外，其余凝血因子均存在于新鲜血浆中
A．Ca2+B．FⅢC．FⅫD．FⅠE．FⅦ
参考答案：B
With the teacher's help, he does much ______ in his Chinese study now. [ ]
A. well
B. best
C. better
含马钱子的中成药是（）
A．大活络丹
B．参苏片
C．山药丸
D．六神丸
E．牛黄清心丸
