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

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.

uclb5550

stimuli 刺激 抽象名词， 更适用amount .