“船舶保安记录”应在船上至少保存()年。

----- Tina had nothing for breakfast, ____________ she?

----- _____________. She had some bread and milk.

()是焊接紫铜时，母材和填充金属难以熔合的原因。

With the rapid development of petroleum industry, more and more oil products of high quality are being turned out.

世界上第一部成文宪法是（）

Xiao Ling works very hard. She ______ by the teachers.

下面哪项不是船公司的保安责任？

妊娠几周后用听诊器经孕妇腹壁可听到胎心音（）

港口设施系指()。①由缔约国政府或由指定当局确定的发生船／港界面活动的场所；②锚地；③候泊区；④进港航道等区域。

根据我国《商标法》的规定，商标经初步审定后的异议期应为()。