at/on/in the same day三者有什么区别?请详细解释并举例说明。_百度知 ...答:in表示 一段的时间,如:in the morning, in the afternoon, in the evening, in October, in 1998, in summer, in the past, in the future等。on总是跟日子有关,on Monday, on Christmas morning, on the following, on May Day, on a warm morning等。表示地理位置的in, on :in表示...