单项选择题

申请电讯检疫的船舶，应先向检验检疫机构申请卫生检查，合格者发给卫生证书。该证书自签发之日起( )个月内可以申请电讯检疫。

A．6
B．3
C．9
D．12
<上一题 目录 下一题>
热门 试题

单项选择题
That'll put us both ( ) the picture.
A．of
B．in
C．on
D．/
单项选择题
It's better to teach the people out of work means to earn money( ) to provide money for them.
A．than
B．as
C．most
D．more
相关试题