首页
登录
职称英语
[originaltext] Would the world really be so much better off if there were no
[originaltext] Would the world really be so much better off if there were no
游客
2024-03-03
55
管理
问题
Would the world really be so much better off if there were no dust? The answer is in some ways, yes, in some ways, no. What is dust anyway? It consists of particles of earth, or other solid matter, which are light enough to .be raised and carried by the wind. Where do these particles come from? They might come from dead plants and animal matter, from sea salt, from desert or volcano sand and from ashes. For the most part, dust is not a very desirable or beneficial thing. But in one way, it helps make the world more beautiful. The lovely colors of the dawn depend to a great extent on the amount of dust that is present in the air. Particles of dust in the upper air reflect the sun’s rays. This makes its light visible on earth an hour or two after sunset. But different colors which make up the sun light are bent .at different angles as they are reflected by the dust and water steam particles. Sunsets are red, because these particles bent the red rays of the sun in such a way that they are the last rays to disappear from view. Another useful function of dust has to do with ram. The vapor water in the air would not become a liquid very readily, if it did not have the dust particles serving as centers for each drop of water. Therefore, clouds, mist, fog and rain are largely formed of an infinite number of moisture particles of dust.
选项
A、Formation of raindrops in the air.
B、Formation of vapor water in the air.
C、Development of air pollution.
D、Increase of raindrops.
答案
A
解析
[听力原文]
What is another function of dust according to the speaker?
根据四个选项可推测问题可能询问某物的“作用”。本题关键句为“Another useful function of dust...centers for each drop of water.”灰尘的另一个功能和下雨有关。如果没有灰尘作为雨滴的核心,空气中的水蒸气不会很容易的变成液体落下。因此可知灰尘的另一个作用是成雨。故选项A)为正确答案。
转载请注明原文地址:http://tihaiku.com/zcyy/3503111.html
相关试题推荐
[originaltext]InFebruarylastyear,mywifelostherjob.Justassuddenly
[originaltext]InFebruarylastyear,mywifelostherjob.Justassuddenly
[originaltext]Time!Ithinkalotabouttime.Andnotjustbecauseit’sthe
[originaltext]M:MissJones,couldyoutellmemoreaboutyourfirstjobwithh
[originaltext]Whencouplesgetmarried,theyusuallyplantohavechildren.
[originaltext]Whencouplesgetmarried,theyusuallyplantohavechildren.
[originaltext]Obtaininggoodhealthinsuranceisarealnecessitywhileyou
[originaltext]Obtaininggoodhealthinsuranceisarealnecessitywhileyou
[originaltext]KatherineGramgraduatedfromtheUniversityofChicagoin19
[originaltext]KatherineGramgraduatedfromtheUniversityofChicagoin19
随机试题
HaveyoueverwonderedwhataDegreemightbeworthtoyou,yourjoborcare
Thinkbeforeyoupost.Youmightnotbeawareofhowmuchinformationyou’re
[originaltext]InDisney’scartoonWall-E,therobotisleftbehindonades
______isageneraltermforverbalcategorythatdistinguishesthestatusofeve
Whatisthemainconcernoftalk?[br][originaltext]TodayIwouldliketo
在社区调查中,抽样调查是必须遵循的一个原则是()。A.随机性 B
D前面四个图形可以拼合成选项D的图形。故答案为D。
某公司职员王小姐于2008年4月领取工资8000元,依据新的个税起征点2000元
根据斯腾伯格的成功智力理论,个体比较、判断、评价和批判等思维活动属于A.分析性智
建筑施工企业项目经理,是受企业()委托对工程项目施工过程全面负责的项目管理者。A
最新回复
(
0
)