题目内容
The word‘day’has two meanings．When we talk about the number of days in a year，we are using‘day’to mean 24 hours．But when we talk about day and night，we are using‘day’to mean the time between sunrise and sunset．Since the earth looks like a ball，the sun can shine on only half of it at a time．Always one half of the earth is having day and the other half night．A place is moved from day into night and from night into day over and over by the spinning(旋转)of the earth．At the equator(赤道)day and night are sometimes the same length，they are each twelve hours long．The sun rises at 6 o’clock in the morning and sets at 6 o’clock in the evening．For six months the North Pole is tilted(倾斜的)toward the sun．In those months the Northern Hemisphere(半球)gets more hours of sunlight than the Southern Hemisphere．Days are longer than nights．South of the equator nights are longer than days．For the other six months the North Pole is tilted away from the sun．Then the Southern Hemisphere gets more sunlight．Days are longer than nights．North of the equator nights are longer than days．Winter is the season of long nights．Summer is the season of long days．
1.When the Western Hemisphere is having day．the Eastern Hemisphere is having_________．
A. both day and night B. day
C. neither day nor night D. night
2.At the equator day is_________ as long as night．
A. sometimes B. never C. usually D. always
3.When the North Pole is tilted toward the sun，the Northern Hemisphere gets _________ sunlight．
A. less B. more C. all D. no
4.When it is winter in China，_________．
A. the USA is tilted toward the sun
B. the South Pole is tilted away from the sun
C. the North Pole is tilted toward the sun
D. the North Pole is tilted away from the sun
1.D 2.A 3.B 4.D 【解析】 这篇短文从day这个单词的两个意思说起，给我们解释了地球上为什么有黑夜和白天，其实这是与地球的自转有关的。 1.推理判断题。根据短文中Always one half of the earth is having day and the other half night可知，当地球的一半是白天的时候，另一半就是黑夜。由此可...
