单项选择题

关系国家安全，首先要树立什么？
A、民族自豪感。
B、民族自信心。
C、国家秘密的意识。
D、民族自尊心。

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单项选择题

电流表明在导体截面上的某处通过了多少电荷量，能够反映电流在导体中的具体分布情况.

A．对
B．错

多项选择题

The counterfeit of China-made porcelain once appeared in Europe, which means that _____.（） A. some people were so hungry of Chinese porcelain B. the exported Chinese porcelain was far from enough C. Chinese porcelain was a sign of wealth and artistic tastes D. European people were much more trendy