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
43
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:https://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
Wherearetheytalking?[br][originaltext]M:HowlongcanIkeepthisbook?W
Sinceancienttimesvolcanoeshavestruckterrorandwonderintothehearto
影响气道阻力最重要的因素是:A.呼吸道长度 B.气流速度 C.气流形式 D
水害监测预报系统技术主要包括( )。A.煤矿水害监测预警系统 B.基本水文地
下列自治区中最早建立的是()。A.西藏 B.内蒙古 C.宁夏 D.新疆
各种运输方式内外部的各个方面的构成和联系,就是( )。 A.运输系统
量化交易主要指通过数学分析、挖掘价格运动规律,对相关宏观经济指标、财务数据、量价
甲乙丙三国订有贸易条约。后甲乙两国又达成了新的贸易条约,其中许多规定与三国前述条
银行承兑汇票的承兑银行,应当按照票面金额向出票人收取()的手续费。A:千分之一
影响能量代谢最主要的因素是A.寒冷 B.高温 C.肌肉活动 D.精神活动
最新回复
(
0
)