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
Humans aren’t the only ones to take a summer holiday, a new study has revealed. Creepy-crawlies, flies, and plants also join the
Humans aren’t the only ones to take a summer holiday, a new study has revealed. Creepy-crawlies, flies, and plants also join the
admin
2011-04-03
19
问题
Humans aren’t the only ones to take a summer holiday, a new study has revealed.
Creepy-crawlies, flies, and plants also join the vacation rush by hitching long-haul rides inside airline baggage.
The research reveals that—like people in many countries—June, July, and August are the peak months for long-distance travel.
Jet-Setting Beetles
Previous studies have shown that international flights are a significant factor in unwelcome insect invasion. Some 73 percent of recorded pest interceptions in the U.S., in fact, occur at airports.
Curious to determine when insects pack their bags and where the bugs are most likely to go, Andrew Tatem and Simon Hay of the University of Oxford in England studied global flight patterns for the 12-month period from May 1,2005 to April 30,2006.
Pest travel between far-flung locations is more likely when the weather is similar in both regions, making it easy for the pests to settle into their new home.
The researchers used rainfall, temperature, and humidity data from each region to work out which places linked by the global flight network had the most similar climates at various times of the year.
"Hawaii, with its moderate year-round climate, is a hot spot for pest invasions," Tatem said. "It is linked to a similar climate in Central America in April, Asia in July, and the Caribbean in October."
In general, though, June, July, and August are the peak months for insect travel.
"There are more airports in the Northern Hemisphere, and the major Southern Hemisphere airports tend to be closer to the Equator," Tatem said. "The June-to- August period stood out as the time when, overall, the busiest flight routes connect geographically distant but climatically similar locations."
According to the article, what is the main cause of insect invasions?
选项
A、Changing wind patterns.
B、Unusually hot temperatures.
C、International flights.
D、Changes in agricultural chemicals.
答案
C
解析
转载请注明原文地址:https://jikaoti.com/ti/VojsFFFM
本试题收录于:
托业阅读题库托业(TOEIC)分类
0
托业阅读
托业(TOEIC)
相关试题推荐
Ifyouhaveanyquestions,please______yourhands.
_______youarewrong,youshouldsaysorry.
We______aroundthefactoryduringourvisit.
December25thisChristmasDay.ManyAmericansarebusywithChristmasandthewinterholidayseason.BuyingaChristmastreeis
A、Ofcourse.B、I’mOK.C、Thanks.A
In1870srichpeoplebegantospeakofspendingweekendsinthecountryvisitingfriends.Formostpeoplebackthen,however,th
"Whereismeuniversity?"isaquestionmanyvisitorstoCambridgeask,butnoonecangivememaclearanswerforthereisnow
Howmanyyearsrepaymentscheduledotheyworkon?
XinhuaGarmentCompanywantstoexportitsgoalstoacustomerinGermany.Advisethecompanythetwotradefinancingmethodsof
To:RexRoeges,CustomerServiceDepartmentFrom:DavePalmerRe:LostbookDearMr.RexRoeges,Iamwritingthise-mailco
随机试题
零件图是编制工艺规程最主要的原始资料。()
二元函数z=x3-y3+3x2+3y2-9x的极小值点为().
下列关于阿托品对眼的药理作用的叙述,错误的是()。
将(其中D:x2+y2≤1)转化为极坐标系下的二次积分,其形式为()。
在确定审计工作底稿的格式、要素和范围时,注册会计师应当考虑的主要因素有()。
________是最基本的礼仪。
中国半殖民地半封建社会开端于()。
以下是一个西方经济学家陈述的观点:一个国家如果能有效地运作经济,就一定能创造财富而变得富有;而这样的一个国家想保持政治稳定,它所创造的财富必须得到公正的分配;而财富的公正分配将结束经济风险;但是经济风险的存在正是经济有效率运作的不可或缺的先决条件。这个经济
80386可以预先提取多达( )个字节指令存入队列中。
Arabiclanguageisoneoftheworld’smostwidelyusedlanguages.ItistheofficerlanguageofmanyArabnationsinthe【M1】____
最新回复
(
0
)