He ____ got a cold. [ ]
A. have
B. has
C. had
D. is having
答案：B
与胎膜早破原因无关的因素有（）
A.机械性刺激
B.妊娠早期性生活
C.多胎妊娠
D.羊水过多
E.创伤
认股权证的剩余有效期间越长，认股权证的价值越大.
