Vitamins and minerals such as iron calcium are another group of essential nutrients th
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Vitamins, and minerals such as iron, calcium, are another group of essential nutrients, though the body does not need ______ it does the macronutrients.
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
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正确答案：A
比较结构题。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"stoohotadaytowork．(天热得无法工作。)根据句意，故A正确。