单项选择题
The phrase “When built” in the Certificate of Vessel’s Nationality means（）.
A.when was your vessel built B.at what time is your vessel building C.when is your vessel built D.at what time you built your vessel
单项选择题 个人质押贷款协议取消应在（）办理。
问答题 简述影响产汽率的因素？
问答题 什么情况下应闭锁重合闸？
