除了妊娠妇女以外,还有哪类妇女会出现妊娠期龈炎症状()
A.育龄期妇女
B.长期口服避孕药的妇女
C.有痛经的妇女
D.绝经妇女
E.做过绝育手术的妇女
参考答案:B
—How are you going to the Summer Palace?
—We're going there ____ bike. [ ]
A. for
B. at
C. of
D. by
属于周期非特异性药的是()
A.烷化剂
B.长春碱类
C.紫杉醇
D.甲氨蝶呤
E.巯嘌呤