The word “day” has two meanings. When we talk about the number of days in a year, we are u

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 in the morning and sets at 6 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 night. 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】When the Western Hemisphere is having day, the Eastern Hemisphere is having     .A．both day and nightB．day C．neither day nor night D．night【小题2】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3】At the equator day is as long as night     .A．sometimesB．neverC．usuallyD．always【小题4】When the North Pole is tilted toward the sun, the Northern Hemisphere gets      sunlight.A．lessB．more C．allD．no【小题5】When it is winter in China,     .A．the USA is tilted toward the sunB．the South Pole is tilted away from the sunC．the North Pole is tilted toward the sunD．the North Pole is tilted away from the sunD