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
El Nino is the term used for the period when sea surface temperatures are above normal off the South American coast along the eq
El Nino is the term used for the period when sea surface temperatures are above normal off the South American coast along the eq
admin
2010-08-07
42
问题
El Nino is the term used for the period when sea surface temperatures are above normal off the South American coast along the equatorial Pacific, sometimes called the Earth’s heartbeat, and is a dramatic but mysterious climate system that periodically rages across the Pacific.
El Nino means "the little boy" or "the Christ child" in Spanish, and is so called because its warm current is felt along coastal Peru and Ecuador around Christmas. But the local warming is just part of an intricate set of changes in the ocean and atmosphere across the tropical Pacific, which covers a third of the Earth’s circumference. Its intensity is such that it affects temperatures, storm tracks and rainfall around the world.
Droughts in Africa and Australia tropical storms in the Pacific, torrential rains along the Californian coast and the Peruvian deserts have all been ascribed to the whim of El Nino.
This at least is the theory, and it has worked pretty well over the past century, with El Nino occurring about every three to five years and La Nina in between. But there have been some baffling developments in recent years. For one thing, El Nino has returned three times in the past four years. For another, since 1976 El Nino has dominated relative to the cooler phase (La Nina). There has been only one significant La Nina, but five El Ninos, including an extremely severe one in 1982—1983 that caused damage costing 8 billion dollars. Moreover a huge pool of warm water has settled down near the dateline in the central Pacific.
Yet it is important to understand the changes if scientists are to be able to forecast the climatic effects of El Ninos with any degree of accuracy. This is not just an academic task— accurate forecasts can spell out feast or famine in many tropical countries around the world. Forecasting efforts have focused on El Nino, whose effects are generally more severe than those of La Nina.
A worrying possibility is that the changes maybe due to greenhouse warming. If so, the recent fluctuations may be an early glimpse of worse things to come.
When does El Nino happen?
选项
A、The water temperature is above normal.
B、Sea surface temperatures are higher than usual.
C、The water temperature is below normal.
D、Sea surface temperatures are lower than normal.
答案
B
解析
细节题。根据第一段第一句可知当洋面温度超过正常范围的时候会发生厄尔尼诺,所以正确答案为B。
转载请注明原文地址:https://kaotiyun.com/show/T9xd777K
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
ComparedwithB.T.Washington,DuBois’spoliticalstandwas______.Accordingtothetext,DuBolsworkedasallofthefollo
Americanshaveacrazeforthesun,abeliefthatsunwillcurechronicillness,andthatwherethereissunshinetherewillbe
ThreedevelopmentsintheUnitedStateshighereducationstartedmorethanacenturyagofollowingthe______.
WhatisthemistakenimpressionoftheAmericanIndianscreatedbymostmovies?
TheOysterBaratGrandCentralStationinNewYorkprovidedFlemingwithhisbestmealinAmerica.Theoysterstewhelikedso
WiththereforminChina’sHigherLearning,mostcollegestudentsfeelthattheyarefortunateenoughtobeabletotakeelectiv
Whilefashionisthoughtofusuallyinrelationtoclothing,itisimportanttorealizethatitcoversamuchwiderdomain.Iti
Theauthorthinksontheproblemofcloning,Ms.Macklinistoo
Accordingtothepassage,whichcountry’sstudentsscoredthehighestinmath?
随机试题
那宝玉心中又想着:“我不管怎么样都好,只要你随意,我就立刻因你死了,也是情愿的:你知也罢,不知也罢,只由我的心,那才是你和我近,不和我远。”黛玉心里又想着:“你只管你就是了:你好,我自然好。你要把自己丢开,只管周旋我,是你不叫我近你,竟叫我远了。”看官
最常见的泌尿系结石是
呼吸链中能直接将电子传递给氧的成分是
甲、乙、丙三人共同抢劫案,一审判决后,甲对一审判决提出上诉后突然死亡,乙也提起了上诉,丙未提出上诉,二审法院开庭审理了此案。请根据本案回答下列问题:二审法院经审理后认为,对乙、丙的量刑均过轻,且应定抢劫罪,则下列选项说法正确的有:()
特雷诺指数可以衡量基金经理的风险分散程度。( )
关于投资性房地产转换日的确定,下列说法中正确的有()。
“十二五”规划纲要中规定,要确保科学发展取得新的显著进步,确保转变经济发展方式取得实质性进展,其基本要求是()。①坚持把经济结构战略性调整作为加快转变经济发展方式的主线;②坚持把科技进步和创新作为加快转变经济发展方式的重要支撑;③
现在很多人说读书没用。建议早点儿找工作。就此谈谈你的看法?
2004年10月8日和9日,温家宝总理在河内召开的第五届亚欧首脑会议上发表重要讲话,就进一步加强亚欧合作提出的主张是()。
ThereadingofthefirstchapterofthenovelPrideandPrejudicehasledthereadertotheunderstandingofMrsBennetasawom
最新回复
(
0
)