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
61
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://www.kaotiyun.com/show/r0id777K
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
[A]year[B]winter[C]summer[D]passport[E]umbrella[F]medicine[G]newspaperItisthetimefromJanuarytoDecember.
[A]year[B]winter[C]summer[D]passport[E]umbrella[F]medicine[G]newspaperPeoplereaditforinformation.
"Whereistheuniversity?"isaquestionmanyvisitorstoCambridgeask,butnoonecangivethemaclearanswerforthereisno
SharonSuarezhasbeenlookingforwardtothedaywhenshewon’thavetocarrygroceries(食品杂货)fromhercartoherhouse.Thatd
Manyyearsago,KarlBenzdevelopedacar,butbeforehecouldshowittothepublic,someonehadtodriveit.BertaBenzbeliev
FEIFEIELEVATORSisoneoftheleadingelevatorcompaniesintheworldwithmorethan120branchcompanies(分公司)aroundtheglobe
JimhaslearnedEnglishforthreeyears.JimbegantolearnEnglishthreeyears______.
NarberthLibraryoffersyoupleasurereadingandagreatnumberofinformationservices.TheLibrarywasbuiltin1921byamemb
accept,discount,against,dishonoured,attached,hypothecation,credit,draw,ownership,amountWhenaLetterofCredith
A、Hewillprovideinvestmentservice.B、Hewillhelpthecustomers.C、Hewilljointhecommercialbank.D、Hewillpurchaseorse
随机试题
肺胀病名首见于:
桂枝汤原方服法要求"服已须臾,吸热稀粥一升余",其意义在于
平原河网地区的城市用地工程适宜性评定重点是()
下列关于敏感性训练目的的表述,错误的是( )。
甲公司2015年年初的递延所得税资产借方余额为50万元,与之对应的预计负债贷方余额为200万元;递延所得税负债无期初余额。甲公司2015年度实现的利润总额为9520万元,适用的企业所得税税率为25%且预计在未来期间保持不变;预计未来期间能够产生足够的应纳税
根据保险法律制度的规定,投保人在订立保险合同时故意或因重大过失未履行如实告知义务,足以影响保险人决定是否同意承保或提高保险费率的,保险人有权解除合同,保险人解除合同的权利,自保险人知道有解除事由之日起超过一定期限不行使而消灭,该期限为()。
衡量计算机的主要性能指标除了字长、存取周期、运算速度之外,通常还包括(8),因为其反映了(9)。(8)
Whatdoesthespeakersuggestthatthestudentsshoulddoduringtheterm?
Thefinalproposalswerearatherunsuccessful______betweentheneedforprofitabilityandthedemandsoflocalconservationis
—Howareyoudoingsinceyouquityourteachingjob?—______Iworkoutdoorsnow,asagardener.Themoneyisnotsogood,butI
最新回复
(
0
)