从发情开始至发情结束所持续的时间称为().
A.发情周期
B.发情持续期
C.休情期
D.发情期
E.都不是
参考答案:B
Turn on the television or open a magazine and you _____ advertisements showing happy families. [ ]
A. will often see
B. often see
C. are often seeing
D. have often seen
中国香港、澳门和台湾地区的制药厂商申请注册的药品,参照进口药品注册申请的程序办理,符合要求的,发给()
A.《国产药品注册证》
B.《新药证书》
C.《进口药品注册证》
D.《医药产品注册证》