首页
登录
职称英语
Surprisingly, there is a relationship between sea salt and the making of rain
Surprisingly, there is a relationship between sea salt and the making of rain
游客
2023-09-22
37
管理
问题
Surprisingly, there is a relationship between sea salt and the making of rain drops. Most of the water droplets that make up clouds are formed around small, solid particles. In order to fall as rain, the cloud droplets have to increase in size. Clouds from which rain does not fall have droplets that are fairly uniform in size. Clouds that produce rain have some droplets that are much larger than others.
The production of rain depends on the presence of the large droplets that grow in size by coalescence (a fusing together). There is evidence to support the theory that a particle of sea salt serves as the nucleus (核,核心) or center, around which the larger droplets form. Most of the sea salt probably enters the atmosphere from, bubbles that form on the surface of the sea. When the bubbles break, a tiny, even microscopic, droplet of salt water is cast into the air. Once in the atmosphere, the microscopic piece of salt collects water vapor from the air. The water vapor then condenses on the particle of salt. The moisture absorbed by the salt particles, dissolves the salt, thus leaving only a slightly salty cloud droplet.
Cloud droplet, formed from condensation of salt particles of dust particles. The reason is that salt particles are usually larger than dust particles. Their larger size is instrumental (有作用的)in making the single rain droplet grow by coalescence with smaller droplets. Since low level clouds don’t rise high enough to produce ice crystals as a source of condensation, it most likely is the salt particles that cause them to become rain clouds.
选项
A、dust particles
B、droplets that are uniform in size
C、droplets that are large and small
D、bubbles
答案
C
解析
本题首先弄清雨水云是如何形成的,其特点就是它是由大水珠(由Salt particles形成)和小水珠(dust particles形成的)组成。所以选项A不全面,B项则是非雨水云的特点,D项bubble是泛指,显然不符合题意。C项正好包括雨水云的特点,故为正确选择。
转载请注明原文地址:https://tihaiku.com/zcyy/3035867.html
相关试题推荐
Theycherishthe(friend)______betweenthem.friendship句意:他们很珍惜彼此的友谊。该题考查的是词性转换。
Itisstill(know)______whethertherewillbeawarbetweenthesetwocountrie
Thereisn’tanyreal(different)______instructurebetweenthesetwopointsof
Theteacher______(able)hisstudentstomasterthenewwordsbymakingupsenten
Acontractisanagreementbetweentwoormorepeopleinwhichonepersonag
Acontractisanagreementbetweentwoormorepeopleinwhichonepersonag
Between1977and1981,threegroupsofAmericanwomen,numbering27inall,
Between1977and1981,threegroupsofAmericanwomen,numbering27inall,
Between1977and1981,threegroupsofAmericanwomen,numbering27inall,b
Along-timerelationshipbetweenbusinessandgovernmenthaspreventedforeign(
随机试题
Aboutfiftyyearsago,plantphysiologistssetouttogrowrootsbythemselv
Despitethefactthattodayvirusesareknowntocausecancerinanimalsand
从题材上讲,浪漫主义时期芭蕾舞剧()开辟了木偶题材的芭蕾舞剧发展领域。A.《仙
男,13岁,因全身发绀和突然意识丧失半小时入院。患儿于生后8个月发现双眼睑下垂,
烧结法生产氧化铝的流程包括:①生料浆制备;②熟料溶出;③熟料烧结;④粗液脱硅;⑤
失能收入损失保险具有的特点包括()A.失能收入损失保险主要是满足被保险人因暂
现称量500g砂样进行筛分试验,应要求所有各筛的分计筛余质量和筛底的总质量与50
(2016年)下列各项因素中,注册会计师在确定实质性分析程序的可接受差异额时需
根据《创业板上市公司证券发行注册管理办法(试行)》,以下说法正确的是( )。
油罐充水试验的要求是()。A.充水试验采用淡水,罐壁采用普通碳素钢时,水温不得低
最新回复
(
0
)