题目列表(包括答案和解析)
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.
（ ）6.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
（ ）7. A place is moved from day into night and from night into day over and over by ________ of the earth.
A. the pushing B. the pulling
C. the spinning D. the passing
（ ）8. At the equator day is as long as night ________.
A. sometimes B. never C. usually D. always
（ ）9. When the North Pole is tilted toward the sun, the Northern Hemisphere gets ________ sunlight.
A. less B. more C. all D. no
（ ）10. 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
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.
（ ）6.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
（ ）7. A place is moved from day into night and from night into day over and over by ________ of the earth.
A. the pushing B. the pulling
C. the spinning D. the passing
（ ）8. At the equator day is as long as night ________.
A. sometimes B. never C. usually D. always
（ ）9. When the North Pole is tilted toward the sun, the Northern Hemisphere gets ________ sunlight.
A. less B. more C. all D. no
（ ）10. 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
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.
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.A place is moved from day into night and from night into day over and over by ________ of the earth.
A. the pushing B. the pulling C. the spinning D. the passing
3.．At the equator day is as long as night ________.
A. sometimes B. never C. usually D. always
4.When the North Pole is tilted toward the sun, the Northern Hemisphere gets ________ sunlight.
A. less B. more C. all D. no
5.．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
| 完形填空。 | ||||
| Many scientists say that the world is getting hotter and hotter. If they are right, the ice at the North and South Pole will melt eventually. If this happens, the sea will 1 and may cover most 2 all of Singapore. This will force everybody to move to a 3 country. We know that the sun 4 the earth. The heat from the sun hits the 5 , and some of 6 goes back into the sky. However, factories and cars 7 a lot of carbon dioxide (二氧化碳). When the gas rises into the sky, the heat from the sun can come 8 them but the heat from the ground cannot. It 9 near us in the sky and makes the 10 hotter and hotter every year. Scientists call this the "greenhouse effect" because a greenhouse is a small glass 11 which is hot inside. It is used for 12 plants in cool countries. Many countries are 13 about the greenhouse effect. They are trying to stop factories and cars from sending 14 gases into the sky. Scientists are not sure when the world will get much hotter. Some people say that the greenhouse effect has 15 already and has begun to affect the world's weather. | ||||
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