25. Different foods have different_____ of chemical potential energy, which can be released as they are metabolized.
(A) amount
(B) number
(C) amounts
(D) numbers

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統計： A(107), B(8), C(128), D(13), E(0) #1825241

詳解 (共 2 筆)

#3267852

 The word amount is used in the singular to convey a single quantity

Since quantities tend to be measured with reference to content, source, time and space, a heterogenous amount is often presented as the plural amounts, to communicate the complexity of content, source, time or space. 

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