题目内容

Human beings' dependence on nature becomes more and more ______.

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At the same time, we depend more than ever before on nature for its _____________________.

The ecological crisis is a problem which requires __ among different nations.

个体膳食摄入量调查最常用的方法是

A. 膳食史法
B. 24h膳食调查法
C. 称重法
D. 记账法

24h膳食调查法的三种辅助工具___、_、___。