苏联学者斯特鲁米林根据马克思关于复杂劳动等于多倍简单劳动的论述，提出了（）的概念。
参考答案：劳动简化率
根据所给的句子，仿照例句用must或mustn't造句。
e.g. Never swim in the waterfall.
You mustn't swim in the waterfall.
1. Never speak loudly in the library.
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2. Never sleep outside at night in winter.
3. Don't play with fire.
4. Always do warm-up exercises before running.
5. Always wear sports shoes on Sports Day.
( )是中国首家中外合资银行。
A．海口国际银行 B．华南国际银行C．协作银行 D．厦门国际银行
