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
23
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.
What’s the best title for this passage?
选项
A、El Nino
B、How Does El Nino Happen
C、What Is El Nino
D、The Effects of El Nino
答案
A
解析
确定标题题。文章通篇讲的都是厄尔尼诺这种气候现象,而B“如何发生”,C“什么是厄尔尼诺”,D“厄尔尼诺的影响”,都是文章介绍的一部分,不能涵盖整篇文章。故应选A。
转载请注明原文地址:https://kaotiyun.com/show/L9xd777K
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
Thetangohasprobablytraveledfurtherandgonethroughmorechangesthanalmost【21】______.Africanslavesbroughtthetango
Somepeoplewerejustborntorebel;CharlesDarwinwasoneofthem.【21】______NicholasCopernicus,BenjaminFranklinandBillGa
WhatisthepopulationofSydneyaccordingtothepassage?
TheOysterBaratGrandCentralStationinNewYorkprovidedFlemingwithhisbestmealinAmerica.Theoysterstewhelikedso
Wesometimesthinkhumansareuniquelyvulnerabletoanxiety,butstressseemstoaffecttheimmunedefensesofloweranimalsto
PeopleintheUnitedStatesinthenineteenthcenturywere【C1】______bythe【C2】______thatunprecedentedchangeinthenatio
Thetangohasprobablytraveledfurtherandgonethroughmorechangesthanalmost【C1】______Africanslavesbroughtthetangot
Thetangohasprobablytraveledfurtherandgonethroughmorechangesthanalmost【C1】______Africanslavesbroughtthetangot
Researcherssaidthatchildrendonotnecessarilydevelophealthybonesinareportthatstresses______consumptionofcalcium-
Researcherssaidthatchildrendonotnecessarilydevelophealthybonesinareportthatstresses______consumptionofcalcium-
随机试题
与机遇失之交臂在当今世界彩色胶片市场上,有美国柯达和日本富士两家公司在争雄。富士公司自1984年取得“第23届奥运会专用胶卷”特权后,目前以更加咄咄逼人的态势,决心与柯达争夺世界上的每一个顾客,柯达的霸主地位受到严重的挑战。而在上世纪70年代,柯
在Windows7中,下列有关快捷方式的叙述,错误的是________。
痰迷心窍的主要症状有痰火扰心的主要症状有
影响骨折愈合最主要的因素是
波长为λ的单色光垂直入射到一衍射光栅上,当光栅常数为(a+b)时,第一级衍射条纹对应的衍射角为ψ,当换成光栅常数为的光栅时,第一级衍射条纹对应的衍射角为2ψ,则λ/(a+b)为( )。
发生质量事故后,()必须将事故的简要情况向项目主管部门报告。
在执行过程中,案外人对执行标的提出异议,理由成立的,由( )批准中止执行。
题中在零售环节征收消费税的金银首饰包括( )。该金店当月应纳增值税为( )元。
新《纲要》指出:“幼儿园教育应尊重幼儿的人格和权利,尊重幼儿身心发展的规律和学习特点,以()为基本活动,保教并重,关注个别差异,促进每个幼儿富有个性地发展。”
国家使用经济手段通过市场机制来实现宏观调控,这属于宏观调控中的直接调控。()
最新回复
(
0
)