单项选择题
A.to B.for C.of D.on
The Certificate of pratique shall only have effect in （...
单项选择题The Certificate of pratique shall only have effect in （）.
A.all ports of the issuing country B.all ports of the world C.all ports other than a issuing country D.all ports of ship's arriva
The government of PR China （） that the above-mentioned ...
单项选择题The government of PR China （） that the above-mentioned ship complies with the provisions of the regulations annexed to the Convention referred to above as regards radiotelegraphy and radar．
A.certifies B.confirms C.contains D.construes
