单项选择题

个人对国家的责任是人生责任的核心，下列词语表达了这种核心的是( )。

A．前仆后继
B．天下兴亡，匹夫有责
C．鞠躬尽瘁，死而后已
D．先天下之忧而忧，后天下之乐而乐
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单项选择题
Copenhagen is one of the ports of ______.
A. Finland
B. Denmark
C. France
D. Germany
单项选择题
The goods which are carried into and out of the territory by the same vessel or aircraft are defined as ______.
A．transit goods
B．transshipment goods
C．through goods
D．import and export goods
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