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
Lightning bugs can blink themselves because of a chemical substance
Lightning bugs can blink themselves because of a chemical substance
admin
2012-05-04
65
问题
Lightning bugs can blink themselves because of a chemical substance
(11)Lightning bugs are one special species in nature, they have own feature in the abdomen of their bodies, in which there is a chemical substance. And they can light them up and control when they blink and how long they blink. (12) But why lightning bugs light up? The following reasons may account for this. They are basically to find a mate. It’s a way that lightning bugs communicate with each other. They use their blinking signals to attract each other. (13)The female lightning bugs have brighter and stronger light, because they are the ones who are trying to attract males to them. (12) And different species of lightning bugs have different patterns of flashing light to attract their own species. For example, if there are five different species of lightning bugs all in the same field, they can tell who is their same species and who is not. (12) On other condition, lightning bugs light up when they see their enemies. They aim to frighten and warn the enemies by doing this. Some researchers once made experiments on mice in 1997 ; they confirm that light given off by lightning bugs plays a warning role on mice. This result of research is beyond people’s expectation.
选项
A、Because they have different physical construction.
B、Because they are more offensive than male lightning bugs.
C、Because they want to frighten their enemies.
D、Because they try to attract males to them.
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/iGmK777K
0
专业英语四级
相关试题推荐
Whatisthespeakertalkingabout?
ManypeopleinvestinthestockmarkethopingtofindthenextMicrosoftandDell.However,Iknow【C1】______personalexperien
ManypeopleinvestinthestockmarkethopingtofindthenextMicrosoftandDell.However,Iknow【C1】______personalexperien
OfficialssaywaterlevelsalongtheBrahmaputraRiverstillareatdangerouslevelsalthough_______.
DivorceInarbitration,thedivorcecaseispresentedtoaneutralpartycalledanarbitratorwho,likeajudge,hasthepo
Inmanyculturespeoplemakeadistinctionbetweenfineartandfolkart.Althoughtellingthedifferencebetweenthesetwotype
WhenIfinishedthestory,Leninjumpedupfromhischairandstartedpacingthefloor,______,deepinthought.
Youcanspeak______infrontofMike,butyoucan’teat______inhisrestaurant.
随机试题
委托货代企业办理报检手续的,必须填制统一格式的()。
氢化物原子荧光光度法测罐头中的总砷时,加入()将五价砷还原为三价砷。
A.AMPB.ADPC.ATPD.GDPE.GTP磷酸果糖激酶-1PFK-1的别构抑制剂是
患者,男,79岁。有冠心病病史多年,形神衰败,身体赢瘦,大肉尽脱,伴心悸自汗,神倦嗜卧,心胸憋闷疼痛,形寒肢冷,面色苍白,舌淡苔白,脉细弱。该患者治疗时,宜首选
工程网络计划的计划工期应()。
海外领队、全陪、地陪和讲解员所共有的职责是()。
为有效祛除牙菌斑,每次刷牙的时间不宜少于()分钟。
最早提出教师成长公式“经验+反思=成长”的教育家是()。
某系统集成企业为做好项目风险管理,定义了如下图所示的风险管理过程,以及过程中的参与人员,按照风险管理的要求来说,下图空缺位置应该填写的内容是(297)。
下列选项中,不属于NAT技术的适用领域是()。
最新回复
(
0
)