问题补充：
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（长度）. 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）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.
【小题1】A place is moved from day into night and from night into day over and over by of the earth.A．the pushingB．the pullingC．the spinningD．the passing【小题2】At the equator day is as long as night .A．sometimesB．neverC．usuallyD．always【小题3】When the North Pole is tilted toward the sun, the Northern Hemisphere gets sunlight.A．lessB．moreC．allD．noC
答案：
(答案→)C
解析：这篇短文主要介绍了地球自转和四季产生的原理.
【小题1】根据A place is moved from day into night and from night into day over and over by the spinning（旋转）of the earth.描述,可知选C.
【小题2】根据At the equator（赤道）day and night are sometimes the same length（长度）.描述,可知选A.
【小题3】根据For six months the North Pole is tilted（倾斜）toward the sun. In those months the Northern Hemisphere（半球）gets more hours of sunlight than the Southern Hemisphere.描述,可知选B.
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