首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
One reason human beings can thrive in all kinds of climates is that they can control the qualities of the air in the enclosed sp
One reason human beings can thrive in all kinds of climates is that they can control the qualities of the air in the enclosed sp
admin
2010-05-25
91
问题
One reason human beings can thrive in all kinds of climates is that they can control the qualities of the air in the enclosed spaces in which they live. Air conditioning is the use of mechanical systems to 【C1】______ that control in such places 【C2】______ homes, offices, theaters, institutions, factories, airplanes, and automobiles. The most familiar type of air conditioning is summertime cooling., Although important, this is 【C3】______ one of several aspects of air conditioning. Other applications 【C4】______ the control of the humidity (or air moisture), cleanliness, circulation of the air, and heating.
Tests have 【C5】______ that people generally feel best 【C6】______ certain temperature, humidity, and air velocity conditions. Temperatures can 【C7】______ from 21.5°C with 70 percent relative humidity to 28°C with 30 percent relative humidity. Relative humidity is the 【C8】______ of moisture in the air 【C9】______ a specific temperature compared 【C10】______ the amount it could hold at that temperature. 【C11】______ air velocities range from 4.5 to 10.5 meters per minute. It is also desirable that an air conditioner 【C12】______ dust, pollen, smoke, and odors from the air.
In many industrial environments, air conditioning is essential. Most print shops, for example, 【C13】______ . constant humidity in order to control paper shrinkage and 【C14】______ the 【C15】______ operation in some processes. Libraries, especially ones With rare books, require air control to 【C16】______ the physical quality of their collections. Bakeries and the tobacco and cotton industries require high humidity 【C17】______ their products, and perishables such as fruits must be stored in cool, dry rooms. Some electronic components, drugs, and chemicals must be manufactured 【C18】______ the air is as free as possible 【C19】______ dust and other particles. Air conditioning is 【C20】______ in hospitals, especially in operating rooms.
【C18】
选项
A、what
B、where
C、that
D、which
答案
B
解析
题型:语法题(状语从句)。句意丸有些电子元件、药物以及化学物质必须在没有灰尘和其他微粒的空气中生产。where强调地点所在。
转载请注明原文地址:https://kaotiyun.com/show/y42K777K
0
专业英语四级
相关试题推荐
WriteonANSWERSHEETTWOacompositionofabout200wordsonthefollowingtopic:ClassroomParticipationShouldBe
Whatisamongthereasonswhythemanwantstoreturntheitem?
WriteonANSWERSHEETTWOanoteofabout50-60wordsbasedonthefollowingsituation:YouareDavid/Rachel.Youhavejusth
Thecommitteehasanticipatedtheproblemsthat_______intheroadconstructionproject.
Whatistherelationshipbetweenthespeakers?
Peopletakephotographsfora【C1】______ofreasonsbutthemost【C2】______istomakearecordofsomethinginordertoshowot
______nofartherbusiness,theChairmanclosedthemeeting.
Theyoungmanconsideredit______honortoreceive______OscarAwardforthebestsupportingactor.
Eachpennyandnickel______countedcarefullybythecashier.
随机试题
劣币驱逐良币
小儿急性持续性腹痛,阵发性加剧并伴有休克。最大可能为
因食管胃底静脉曲张破裂引起的上消化道出血,不可采取的止血方法有()
使地基发生剪切破坏而即将失去整体稳定性时相应的最小基础底面压力,称为地基容许承载力。()
为了保持厌氧菌的浓度,厌氧消化设施一般不采用的措施是()。
向特定对象转让股票,未经中国证监会核准,转让后公司股东累计超过()人的,亦构成变相公开发行股票。
按照城镇土地使用税的有关规定,下列用地可免征城镇土地使用税的有()。
我国劳动立法规定集体合同的期限为()。
简述教育研究的发展趋势。
"Ofalltheginjointsinallthetownsinalltheworld,shewalksintomine."It’saclassicquotefromthefilmCasablanca,b
最新回复
(
0
)