题目内容

Foods and herbs are of four natures: cold, heat, warmth and coolness.

A. 对
B. 错

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Foods and herbshave five kinds of flavour: pungent, sweet, sour, bitter and salty.

A. 对
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Qiinvigorates and propels the growth and development.

A. 对
B. 错

AT89S51单片机有（）个引脚

51系列单片机连接时钟电路的引脚是（）和（）。