单选题 .  Strange things happen to time when you travel, because the earth is divided into twenty four time zones, one hour apart. You can have days with more than twenty-four hours, and weeks with more or fewer than seven days.
    If you make a five-day trip across the Atlantic ocean, your ship enters a different time zone every day. As you enter each zone, the time changes one hour. Traveling west, you set your clock back; traveling east, you set it ahead. Each day of your trip has either twenty-five of twenty-three hours.
    If you travel by ship across the Pacific, you cross the international date line. By agreement, this is the point where a new day begins. When yon cross the line, you change your calendar one full day, backward or forward. Traveling east, today becomes yesterday, traveling west, it is tomorrow!1.  The difference in time between zones is ______.
【正确答案】 C
【答案解析】 这是一篇涉及地理方面的知识性小品文。地球上共划分了二十四个时区,两个相邻的时区之间时间正好相差一个小时。因此,我们环球旅行时,就会遇到时差问题。国际日期变更线是新的一天开始的地方。穿越这条线向东去,今天就变成了昨天,向西去,今天就成了明天。
   细节题。由句首的那一句话Strange things happen to time when you travel, because the earth is divided into twenty four time zones, one hour apart. 再联系地理方面的知识,可知时区与时区之间的时间差为一个小时。