Time Zones(时区)
Strange things happen to time when you travel. Because the earth is divided into twenty-four zones one hour apart(相差).You can have days with more or fewer than twenty-four hours, and weeks more or fewer than seven days.
If you make a five-day trip across the Atlantic Ocean(大西洋),your ship enters a different time zone every day. As you enter each zone, the time changes one hour. Travelling west ,you set your clock back; traveling east , you set it ahead. Each day of your trip has either twenty-five or twenty-three hours.
If you travel by ship across the Pacific(太平洋), you cross the international date line. By agreement, this is the point where a new day begins, when you cross the line, you change your calendar one full time day, backward or forward. Travelling east, today becomes yesterday; traveling west, it is tomorrow.
Strange things happen to time when you travel because______.
A.no day really has 24 hours | B.the earth is divided into time zones |
C.time zones are not all the same size | D.no one knows where time zones are |
From this passage it seems true that the Atlantic Ocean___.
A.is divided into five time zones | B.is divided into 24 time zones |
C.is in one time zone | D.cannot be crossed in five days |
If you cross the ocean going west, you set your clock_____.
A.ahead by 25 hours in a new time zone | B.one hour ahead for the whole trip |
C.back one full day for each time zone | D.one hour back in each new time zone |
The international date line is the name for______.
A.the beginning of any new time zone | B.the point where a new day ends |
C.the point where a new day begins | D.any time zone in the Pacific Ocean |