下列关于膳食调查方法的叙述,错误的是()
A.实施膳食调查时必须采用两种或两种以上的混合方法
B.称量(重)法是一种比较精确的膳食调查方法
C.记账法简单易行,可用于账目清楚的食堂单位
D.询问法所需时间短,能获得个体膳食营养素摄入情况
正确答案是A
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Rearrange the following sentences so that they read logically. Put the corresponding letters in a proper sequence in the boxes provided on the answer sheet. The positions of some sentences have been given.A. Given that the problem is global in