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
What’s Killing the Bats First it was bees. Now it is bats. Biologists in America are working hard to discover the cause of t
What’s Killing the Bats First it was bees. Now it is bats. Biologists in America are working hard to discover the cause of t
admin
2015-06-19
43
问题
What’s Killing the Bats
First it was bees. Now it is bats. Biologists in America are working hard to discover the cause of the mysterious deaths of tens of thousands of bats in the northeastern part of the country. Most of the bats affected are the common little brown bats ( Myotis lucifugus,) but other species, such as the long-eared bat, the small-footed bat, the eastern pipistrelle, and the Indiana bat have also been affected. In some caves, more than 90 percent of the bat populations have died.
One possibility is disease. A white fungus (真菌) known as fusarium has been found on the noses of both living and dead bats. However, scientists don’t know if the fungus is the primary cause of death, a secondary cause of death, or not a cause at all, but the result of some other conditions.
Another possible cause is a lack of food. For example, bats typically eat a large number of moths (蛾) , and in some states such as New York, the number of moths has been declining in recent years. If bats can’t eat enough food, they starve to death.
Still other scientists believe that global warming is to blame. Warmer temperatures in recent years have been waking up hibernating (冬眠) bats earlier than usual. If bats break their hibernation at the wrong time, they might not find their expected food sources. The weather might also turn cold again and weaken or kill the bats.
Scientists might not agree on the causes of the bat die-off but they do agree on the consequences. Bats are an important predator of mosquitoes:a single brown bat can eat 1,000 or more insects in an hour. They also eat beetles and other insects that damage plant crops. If there aren’t enough bats, damage will be great from the insects they eat. While bats live a long time for their size—the litde brown bat can live for more than 30 years—a female bat has only one baby per year, so bat populations grow slowly. Many bat species in the United States are already protected or endangered.
How can you help? Do not disturb sleeping or nesting bats. If you discover bats that seem to be sick or that are dead, contact your local Fish& Wildlife Department with the details. However, be careful not to touch the animals.
What does the first sentence in Paragraph 1 mean?
选项
A、Bees have been dying mysteriously.
B、The first article on the website is about bees.
C、Bees usually die before bats.
D、It was bees that caused the deaths of bats.
答案
A
解析
根据下文讲蝙蝠神秘的死亡可知,该句是说蜜蜂已经处于神秘死亡的过程中。
转载请注明原文地址:https://kaotiyun.com/show/SIGd777K
本试题收录于:
职称英语理工类A级题库职称英语分类
0
职称英语理工类A级
职称英语
相关试题推荐
Accordingtothefirstparagraph,whichofthefollowingisNOTaproblemofaging?SoicalSecurityintheU.S.isincreased__
AAddressingaVarietyofBehavior-affectingFactorsBImportanceofImmunizationCRelationshipwithOtherHealthServicesD
Whatareresearchersinterestedindoingastheroadaccidentsworldwideincreasetoashockingrate?Whatistreeofrobotic
EngineeringethicsisacompulsorysubjectineveryinstituteofscienceandtechnologyintheUnitedStates.Itislikelythat
ManandComputerWhatmakespeopledifferentfromcomputerprograms?Whatisthemissingelementthatourtheoriesdon’tyet(51)
AnimalIntelligenceAreAnimalsintelligent?Iftheyare,whichanimalsarethemostintelligent?Thesearenoteasyquestionst
AKripke’sResearchToo1BDangersofHabitualShortagesofSleepCCriticismonKripke’sReportDAWayofOvercomingInsom
GlobalWarmingSmokeiscloudingourviewofglobalwarming,protectingtheplanetfromperhapsthree-quartersofthegre
AnAwfulAfternoonSometimesIfeelthatbeingthemotherofthreesmallchildrenislikerunningalargecircus(马戏团).Onea
TheWeightExperiment1.NicolaWaitershasbeentakingpartinexperimentsinScotlandtodiscoverwhyhumansgainandlosewei
随机试题
大港Y415-114封隔器丢手压力为()。
在沉积和成岩阶段,()矿物的颜色称为原生色或自生色。
下列哪一项属于脾的生理功能
女性,26岁,产前检查发现子宫肌瘤直径2cm,足月顺产后,阴道流血淋漓2月余,前日妇科检查子宫如孕10周,均匀增大,血hCG阳性。此病例最大可能是
患者,女性,35岁。胃大部切除术后第5天,体温上升至38.5℃,诉切口疼痛。首先考虑为
对于股份有限公司而言,其股票价格代表了企业的价值。()
根据下列资料,回答问题。据抽样调查,上海市城市居民家庭人均可支配收入构成情况及部分城市城镇居民家庭人均可支配收入增长情况如下所示:2012年第一季度与上年同期相比,上述八个城市中城镇居民家庭人均可支配收人增长量低于全国城镇居民家庭人均可支配
在SQLServer2008中,若要删除U1架构,使用的语句是:_______SCHEMAU1
学校规定学生住宿标准是:本科生4人一间,硕士生2人一间,博士生1人一间,学生与宿舍之间形成了住宿关系,这种住宿关系是
Therearetwotypesofpeopleintheworld.Althoughtheyhave【21】degreesofhealthandwealthandothercomfortsoflife,oneb
最新回复
(
0
)