When it is winter in China, ______.A. the USA is tilted toward the sun B. the South Pole is tilted away from the sunC. the North Pole is tilted toward the sun D. the North Pole is tilted away from the sun
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
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Some birds will fly away to the south in winter, while _____ will stay with you.A. anotherB. the othersC. othersD. other ones
Neap tides occur ______.A.at the start of spring, when the Sun is nearly over the equatorB.only when the Sun and Moon are on the same sides of the Earth and are nearly in lineC.when the Sun and Moon are at approximately 90°to each other, as seen from the EarthD.when the Sun , Moon, and Earth are nearly in line, regardless of alignment order
Spring tides occur______．A.when the moon is new or fullB.when the moon and sun have declination of the same nameC.only when the moon and sun are on the same sides of the earthD.at the beginning of spring when the sun is over the equator
若有如下程序； main() {char a[][9]={"china"，"Japan"，"USA"，"France"}； printf("\'%s\'\n"，a[2]); } 则程序运行后的输出结果是( )A．'Japan'B．'USA'C．USAD．'inaJapanUSAFrance'
BThe 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.56. 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
When the North Pole is tilted toward the sun, the Northern Hemisphere gets _____ sunlight.A.less B.more C.all D.no
The northern parts of the United States get very cold in the winter.It snows a great deal and the?temperature often goes_____21_____zero degree in January,_____22_____and March.But the northeastern and?northcentral regions of____23______have been financial and industrial centers,and they are heavily polluted.In recent years,people in these regions have begun to take vacations_____24_____these cold winter?months.They go to southern parts of the country____25______it is warmer.Many go to Florida where the?weather is_____26_____.Others go to the southwestern states of Arizona,New Mexico and Texas where they._____27_____dry desert climates.It has become_____28_____nowadays.for old people to move south to these places_____29_____they?retire.Typically these people sell their houses in their home communities and move south to begin a?new life_____30_____senior citizens.Their children likely have homes_____31_____and many of them are moving south_____32_____communities?where they were_____33_____.The southern and southwestern parts of the country are now growing_____34_____any?other part.Business and industry_____35_____many offices and factories in the south.California is already?the most popular state in the country.第（30）题答案A.forB.asC.toD.toward
日落降国旗。（）A、The ensign should be hoisted when the sun rises.B、The ensign should be lowered when the sun rises.C、The ensign should be hoisted when the sun sets.D、The ensign should be lowered when the sun sets.
单选题An amplitude of the Sun in high latitudes（）.Ais most accurate before sunriseBis most accurate after sunsetCshould only be observed when the Sun's lower limb is above the horizonDis most accurate when the Sun's center is observed on the visible horizon
单选题Neap tides occur（）.AAt the start of spring，when the Sun is nearly over the equatorBOnly when the Sun and Moon are on the same sides of the Earth and are nearly in lineCWhen the Sun and Moon are at approximately 90° to each other，as seen from the EarthDWhen the Sun，Moon，and Earth are nearly in line，regardless of alignment order
单选题The trend toward casual dining has resulted in _____.Abankruptcy of fine china manufacturersBshrinking of the pottery industryCrestructuring of large enterprisesDeconomic recession in Great Britain
单选题Spring tides occur（）.Awhen the moon is new or fullBwhen the moon and sun have declination of the same nameConly when the moon and sun are on the same sides of the earthDat the beginning of spring when the sun is over the equator
单选题Spring tides occur（）.Aat the start of spring，when the Sun is nearly over the equatorBonly when the Sun and Moon are on the same side of the Earth and nearly in lineCwhen the Sun and Moon are at approximately 90°to each other as seen from the EarthDwhen the Sun，Moon，and Earth are nearly in line，in any order
单选题The report of an earthquake (地震 ) in the South China Sea has not been _____ yet.AconflictedBconfusedCconfinedDconfirmed
单选题日落降国旗。（）AThe ensign should be hoisted when the sun rises.BThe ensign should be lowered when the sun rises.CThe ensign should be hoisted when the sun sets.DThe ensign should be lowered when the sun sets.
单选题In summer, monsoon over the South China Sea blows from（）.AnortheastBsouthwestCsoutheastDnorthwest
单选题We learn from the passage that ______.Aall living things on the earth depend on the sun for their foodBa forest looks dark in winter because it absorbs solar energyConly 0.023 of the energy from the sun is made use of on the earthDgreenhouse gases allow heat energy to escape from the earth’ s surface
填空题Air rushes toward the equator from the north and south because of the lower air pressure.____
单选题To center a compass bowl in its binnacle，you should have the ship on an even keel，heading north or south，and adjust the screws until（）.Athe compass heading is in line with the lubber's lineBthere is no lost motion in the gimbal ringsCno change of heading by compass is observed if you raise and lower the heeling magnetDthe gimbal rings do not strike the compass frame when they are tilted