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
2023-08-01
72
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/2886851.html
相关试题推荐
[originaltext]Manypeoplesufferfromsomeformofextremeanxiety.Someex
[originaltext]Manypeoplesufferfromsomeformofextremeanxiety.Someex
[originaltext]Apoorfarmerhadafriendwhowasfamousforthewonderfula
[originaltext]Apoorfarmerhadafriendwhowasfamousforthewonderfula
[originaltext]M:Hi,Grace.MindifIearlunchwithyou?W:No,Mr.Evans,not
[originaltext]M:Hi,Grace.MindifIearlunchwithyou?W:No,Mr.Evans,not
[originaltext]M:Hi,Grace.MindifIearlunchwithyou?W:No,Mr.Evans,not
[originaltext]WhenJohnWestonawokethatmorning,herememberedthathism
[originaltext]WhenJohnWestonawokethatmorning,herememberedthathism
[originaltext]Janet’ssisterisaflightattendantforafamousinternation
随机试题
PASSAGEONE[br]Whatdoes"parlous"meaninParagraph2?Perilous/dangerous.
Yetwitheconomiesinfreefall,managersalsoneedup-to-dateinformation
治疗原发性肾病综合征的主要药物是A.静脉滴注白蛋白 B.泼尼松 C.吲哚美辛
智力年龄的概念是比纳提出的。( )
山东、河南等地都发现有汉代的冶铁遗址,其中河南巩县、郑州的冶铁遗址规模最大。以下
根据我国劳动争议调解仲裁法,发生劳动争议,劳动者一般不可以直接采取的措施是(
基于商品期货的跨品种套利可分为相关商品期货合约之间的套利以及原材料与产成品期货合
《中国药典》规定,应测定相对密度的药材是A.血竭 B.儿茶 C.蟾酥 D.
一项样本量足够大并且实施严格的病例对照研究结果为:喜甜食与糖尿病的关系,OR=1
在进行工程项目费用控制时,下列情形中,可以立即判断费用超支,且需立即纠偏的情况有
最新回复
(
0
)