成熟卵泡的直径大小是()
A.<17mm
B.>18mm
C.18~25mm
D.17~22mm
E.>22mm
参考答案:C
You have done an important job people must be really grateful to you .
A.so… that
B.such… that
C.too … to
D.enough …. to
电子邮件软件向邮件服务器发送邮件时使用的协议是
A.SMTP
B.POP3
C.IMAP
D.MIME