Vitamins and minerals such as iron, calcium, are another group of essential nutr

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问题 Vitamins and minerals such as iron, calcium, are another group of essential nutrients, though the body does not need ______ it does the macronutrients.

选项 A、as great a quantity of these as
B、as a great quantity of these as
C、as great a quantity of these than
D、so a great quantity of these as

答案 A

解析 as…as…表示“和……一样”,注意这种结构的词序为“as+a.+a(n)+n.+as”,与“too+a.+a(n)+n.”和“so+a.+a(n)+n.”结构类似,如:It’s too hot a day to work.(天热得无法工作。)根据句意,故A正确。
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