单项选择题

‎函数的图形在区间上（）．

A．递减且是上凸的
B．递增且是上凸的
C．递减且是下凸的
D．递增且是下凸的

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单项选择题

A、(1) B、(2) C、(3) D、(4)

问答题

With the implementation of China‘s opening-up policy in 1978, Chinese people, who had been shut out from the world for a long time, were eager to learn more about the outside world. The translation among cultures are increasing immensely. Translation is not only the conversion of two different languages, but also a cultural interchange. According to the polysystem theory, the translated literature in primary position highlights the culture of [填空1].

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