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
When it rains or snows, some of the water is reserved by the soil, some is absorbed by vegetation, some evaporates, and the rema
When it rains or snows, some of the water is reserved by the soil, some is absorbed by vegetation, some evaporates, and the rema
admin
2011-01-23
49
问题
When it rains or snows, some of the water is reserved by the soil, some is absorbed by vegetation, some evaporates, and the remainder, which reaches stream channels, is called runoff(径流). Floods occur when soil and vegetation cannot absorb all the water; water then runs off the land in quantities that cannot be carried in stream channels or retained in natural ponds and constructed reservoirs. About 32 percent of all precipitation (雨雪的降落) is runoff, and this amount may be increased by melting snow masses. Periodic floods occur naturally on many rivers, forming an area known as the floodplain (涝原). These fiver floods often result from 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 (暴洪). 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 (海啸) caused by undersea earthquakes.
Floods not only damage property and endanger the lives of humans and animals, but exert other effects as well. Rapid runoff causes soil erosion as well as sediment (沉淀物) deposition problems downstream(下游). Spawning(产卵) grounds for fish and other wildlife habitat are often destroyed. High-velocity currents increase flood damage; prolonged high floods delay traffic and interfere with drainage and economic use of lands. Bridge abutments (桥台) , bank lines, sewer outfalls, and other structures within floodways are damaged, and navigation and hydroelectric power are often impaired(侵害). Financial losses due to floods all over the world are commonly billions of dollars each year. The basic methods of flood control have been practiced since ancient times. These methods include reforestation (再造林) and the construction of levees(防洪堤), dams, reservoirs, and floodways.
Which of the following statements is NOT true according to the passage?
选项
A、When snow is melting, the amount of runoff will become more.
B、Many rivers are flooded periodically.
C、Flash flood is usually caused by earthquakes.
D、Floods also destroy the spawning grounds for fish.
答案
C
解析
C项意为“暴洪通常是由于地震引起”。第一段倒数第2句“暴洪通常由一个相对较小区域内的强降水而形成。”所以选C项。
转载请注明原文地址:https://kaotiyun.com/show/FBtd777K
本试题收录于:
公共英语三级笔试题库公共英语(PETS)分类
0
公共英语三级笔试
公共英语(PETS)
相关试题推荐
Whenitrainsorsnows,someofthewaterisreservedbythesoil,someisabsorbedbyvegetation,someevaporates,andtherema
Whenitrainsorsnows,someofthewaterisreservedbythesoil,someisabsorbedbyvegetation,someevaporates,andtherema
AnkitaAgarwal:Yourarticlemademeashamed.I’vealwaysthoughtofmyselfasnotthetypicalself-absorbedteenager,butIgue
AnkitaAgarwal:Yourarticlemademeashamed.I’vealwaysthoughtofmyselfasnotthetypicalself-absorbedteenager,butIgue
AnkitaAgarwal:Yourarticlemademeashamed.I’vealwaysthoughtofmyselfasnotthetypicalself-absorbedteenager,butIgue
随机试题
一般而言,比率越低表明企业的长期偿债能力越好的指标有()。Ⅰ.资产负债率Ⅱ.产权比率Ⅲ.有形资产净值债务率Ⅳ.已获利息倍数
法律责任
Stressmaybedefinedastheresponseofthebodytoanydemand.Wheneverpeopleexperiencesomethingpleasantorunpleasant,we
下列肛瘘中属于复杂高位瘘的是
A.“P”切迹B.颧突C.腭小凹D.颊侧翼缘区E.远中颊角区下颌舌骨嵴前方,口底上升时的最高点
羚角钩藤汤的组成中含有的药物是()天麻钩藤饮的组成中含有的药物是()
在某项建设工程中,劳务分包单位施工人员在200人以上,则该项目工程应当配备()专职安全生产人员。
甲乙双方因工程施工合同发生纠纷,甲公司向法院提起了民事诉讼。审理过程中,在法院的主持下,双方达成了调解协议,法院制作了调解书并送达了双方当事人。双方签收后乙公司又反悔,则下列说法正确的是()。
下列指标不反映企业偿付长期债务能力的是()。
劳动争议仲裁委员会的组成不包括()。
最新回复
(
0
)