Question

We all have 24 hours ____day。 语法填空中，该处为什么不能填every？one？each

We all have 24 hours ____day。 语法填空中，该处为什么不能填every？one？each？只能填a

Answer 1

We all have 24 hours a day. 此句的意思是: 我们每天只有24小时.
句意不是表达每天有多少小时, 而是表达: 大家都有相同的时间去做某事.
另外:
each : 用於单数名词前, 强调两种或多於两种的事或人的[每一]. 而数目是有限制的.
Each teast contains about 15 questions.
Give each child some chocolate cake.
You should make notes to help you remember each word seperately.
Last week it rained each day. ( 一星期只有7天 : 数目是有限制)
every : 用於单数名词前, 强调多於两种的事或人的[每一]. 而数目可以是无限/非常多的.
Every girl in the calss went to the party.
She has read every book in the library . (图书馆内的书是非常多)
You have every reason to be happy with you new home. (reason 可以在很多)
另: ( day, week, month, year ) 代表时常发生时, 全用 every
every day, every week, every month, every year
She plays tennis every Sunday.
They go on vacation every year.
Train leave every 30 minutes.

至於 one, 若表示[一天之内]则须加 in : in one day

Answer 2

理论不知道，多见见你就知道了
点一下采纳！！！