阳光下的雪滴:every hour on the half hour 是什么意思？

来源：百度文库编辑：高校问答时间：2024/05/05 11:23:39

这是95年的高考阅读题，“buses going to the town center will leave the main hall every hour on the half hour during the day”
Question:at which of the following times will the bus leave the main hall?
A 8:00 9:00 10:00 11:00
B 8:00 9:00 10:30 11:30
C 8:30 9:00 9:30 10:00
D 8:00 9:30 11:00 12:30
我想知道"every hour on the half hour"是什么意思，还有就是这道题选什么，谢谢！
如果是每隔半小时，那everyhour 又怎么解释呢

every hour 每小时
on the half hour半小时
每半小时发一班车。
选C

C
every hour 指每小时中的半小时,就象中间设有一站一样.主要在于
on 的用法

每过半小时，选C

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