不定项选择

转座重组是自然界存在的最为基本的DNA重组方式。

A．正确
B．错误

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《中国食物成分表2002》，其中各类食物成分数据最常用的标准是以100g可食用部分食物来计。

答案：正确

单项选择题

Doing, Being, and Being-in-becoming are all value orientations that correspond to which of the following questions?
A、What is the nature of human beings?
B、What is the relationship of humans to nature?
C、What is the orientation of humans to time?
D、What is the human orientation to activity?