不影响双磁路磁珠法进行凝血测试的因素是（）
A.凝血激活剂
B.纤维蛋白的量
C.溶血
D.黄疸
E.高血脂症
参考答案：C, D, E
Betty likes running and she_____ likes swimming. [ ]
A. also
B. too
C. is
D. either
设f(x)在[-a,a](a＞0)上具有二阶连续导数，f(0)=0，试证：在[-a,a]上至少存在一点η，使
