求教一道语法题（关于amount和number）的区别

alex

The brain is something of a stimulus-reduction system, [U]a means to reduce, in order to comprehend, the nearly infinite amount[/U] of stimuli that reach the sense at any given moment.
A.
B. a means to reduce, in order to comprehend, the nearly infinite number

正确答案是（A），（A）（B）两答案的区别仅仅为句末的‘amount', 'number'，请问这两个词在修饰名词时有什么区别？

uclb5550

stimuli 刺激 抽象名词， 更适用amount .

uclb5550

Sorry, this correct answer of this question should be B. "stimuli" is the plural number of stimulus, thus, requiring the noun "number " that always defines countable noun. "amount" only refers to uncountable noun.