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
A、air swirls B、moisture C、rainfall D、sinking air D
A、air swirls B、moisture C、rainfall D、sinking air D
admin
2011-02-08
32
问题
For those of us lucky enough to always have enough food and water, it may be hard to imagine living through a drought. A drought occurs for a variety of reasons, usually including a lack of rainfall and high temperatures. Soil moisture severely dwindles. Why and how do these meteorological events occur?
As air swirls around the earth, it rises and sinks over different areas of the globe. When air rises it cools and loses moisture. When air sinks, it grows warmer and absorbs moisture, drying out the land. Sinking air helps to form deserts, such as the Sahara Desert in Africa.
Warm, sinking air can hamper cloud formation, which results in less rain and lower overall humidity. When these conditions occur in an area that normally receives enough rain to allow plants to grow and keep water sources replenished, a drought can ensue. The Dust Bowl that affected the prairie regions of the United States was one infamous drought. An equally severe drought occurred in the United States in the summer of 1988. Rainfall o-ver the mid-west, Northern Plains, and the Rockies was fifty to eighty-five percent below normal.
Sometimes over-farming and soil erosion contribute to drought, but there are also natural disasters that can occur when soil is carefully preserved. When a drought hits, there’s little that can be done to end it. Water and soil conservation can help, but until the rains come again there’s not much science can do.
Questions:
14. According to the passage, which results in less rain and lower overall humidity?
15. Which of the following can hamper cloud formation and lead to less rain and lower overall humidity?
16. What can contribute to drought?
选项
A、air swirls
B、moisture
C、rainfall
D、sinking air
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/uhxd777K
本试题收录于:
公共英语四级笔试题库公共英语(PETS)分类
0
公共英语四级笔试
公共英语(PETS)
相关试题推荐
Ithasbeennecessarytoreferrepeatedlytotheeffectsofthetwoworldwarsinpromotingallkindsofinnovation.Itshouldb
AfterhebecameChancellorHitlerhadtoacceptacertaindegreeofroutine.Thiswasagainsthisnaturalinclination.Hehated
AfterhebecameChancellorHitlerhadtoacceptacertaindegreeofroutine.Thiswasagainsthisnaturalinclination.Hehated
AprominentgroupofBritishuniversityteachersthisweekcalledonthefundingcouncilstostopsupportinglow-qualityresearc
Whenthevotewasfinallytaken,itwas3:45inthemorning.Aftersixmonthsofarguingandafinal16hoursofhotparliame
Aweathermapisanimportanttoolforgeographers.Asuccessionofthreeoffourmapspresentsacontinuouspictureofweather
Anewcomputersystemhasbeendesignedtostopshipssinking.Thegreatestdanger【21】______aholedvesselisthatflooding
In1942,theHMSEdinburghwassunkintheBarentsSea.Itwasonits【21】______backtoBritainwithninety-oneboxesofRussian
KarenRusawasa30-year-oldwomanandthemotheroffourchildren.ForthepastseveralmonthsKarenhadbeenexperiencingrepe
随机试题
简述政策方案设计的基本原则。
对于腹痛的临床表现下列各项均恰当,但除外
下列哪项不是艾滋病的口腔表征
A、对乙酰氨基酚B、布洛芬C、西咪替丁D、氢化可的松E、氢溴酸右美沙芬仅用于解热、镇痛的非处方药是()。
综合单价法编制标底的表格有( )。
在国内商业银行的管理中,流动性储备的最主要形式是()。
根据《合同法》的规定,由于债权人的原因,债务人无法向债权人交付合同标的物时,以将该标的物交给提存部门,从而消灭债务,在标的物提存后,标的物毁损、灭失风险责任的承担者是()。
中国的节日历来与文学表现密切相关,历代文人墨客赞美元宵节的诗句________,如今读来仍趣味无穷。填入划横线部分最恰当的一项是:
在一晚间音乐会上,总共有6首歌曲O,P,T,X,Y和Z将被3个歌手G,H和L演唱。这些歌曲将以独唱的形式被连续演出,且每首歌曲只演唱1次。该音乐会的节目组成遵循以下条件:(1)Y必须在T和O的前面;(2)P必须在Z之前在O之后;
IntheUnitedStatesandCanada,aprom,shortforpromenade,isaformaldance,orgettingtogetherofhighschoolstudents.It
最新回复
(
0
)