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
What does "runoff" mean?
What does "runoff" mean?
admin
2010-01-07
57
问题
What does "runoff" mean?
When it rains or snows, some of the water is retained by the soil, some is absorbed by vegetation, some evaporates, and the remainder, which reaches stream channels, is called runoff. Floods occur when soil and vegetation can not absorb all the water; water then runs off the land in quantities and can’ t be carried in stream channels or retained in natural ponds and constructed reservoirs. About 30% of all precipitation is runoff, and this amount is increased by melting snow masses. Periodic floods occur naturally on many rivers, forming an area known as the flood plain. These river floods often result from the heavy rain, sometimes combined with melting snow, which causes the rivers to overflow their banks; a flood that rises and falls rapidly with little or no advance warning is called a flash flood. Flash floods usually result from intense rainfall over a relatively small area. Coastal areas are occasionally flooded by unusually high tides induced by severe winds over ocean surfaces, or by tidal waves caused by undersea earthquakes.
选项
答案
Periodic floods
解析
转载请注明原文地址:https://kaotiyun.com/show/9wPd777K
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
A=BewitchedB=SavingPrivateRyanC=TeamAmerica:WorldPoliceD=GodfatherWhichmovie.tellsthestoryaboutthelastg
A=BewitchedB=SavingPrivateRyanC=TeamAmerica:WorldPoliceD=GodfatherWhichmovie.tellsthestoryaboutthelastg
A=BewitchedB=SavingPrivateRyanC=TeamAmerica:WorldPoliceD=GodfatherWhichmovie.tellsthestoryaboutthelastg
A=BewitchedB=SavingPrivateRyanC=TeamAmerica:WorldPoliceD=GodfatherWhichmovie.tellsthestoryaboutthelastg
TodayTVaudiencesallovertheworldareaccustomedtothesightofAmericanastronautsintip-topcondition,withfairhair,c
TodayTVaudiencesallovertheworldareaccustomedtothesightofAmericanastronautsintip-topcondition,withfairhair,c
ThehistoryofresponsestotheworkoftheartistSandroBotticelli(1444—1510)suggeststhatwidespreadappreciationbycritics
Whatdoes"runoff"mean?
Whatdoes"runoff"mean?
随机试题
阅读以下文字,回答下列问题。哈佛大学生物学家马丁•诺瓦克写道:“合作是进化过程中创造力的源泉,从细胞、多细胞生物、蚁丘、村庄到城市莫不如此。”人类在力求迎接全球新挑战的同时,必须找到新的合作方式。利他主义是合作的必要基础。愿意无私向他人伸出援手,提升了
指导网络营销活动的基本思想是【】
“动中有静,静中有动”说明了()。
以下不属于阿托品试验禁忌证的是
A、相乘B、相克C、相生D、相侮E、母子相及在五行关系中,属于正常相互制约关系的是
固定桥选择的基牙最好是活髓牙,是因为
先端钝尖,基部楔形,边缘具钝锯齿;蒴果长圆形,常3裂,分果瓣船形的饮片是
某企业2012年2月发生如下经济业务:(1)20日,销售给赛鑫公司A产品600件,单价400元/件,共计240000元,增值税销顼税额40800元,款项已存银行。(2)20日,结转上述产品销售成本180000元。(3)25日,以银行存款支付本月广告费
TheBritishMedicalJournalrecentlyfeaturedastrongresponsetowhatwasjudgedaninappropriatelylenientreactionbyamedi
统治阶级创制各种法律规范的目的,归根结底是要从社会生活各个方面确认、保护、发展现实中有利于本阶级利益的政治关系。()
最新回复
(
0
)