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
Mass Strandings of Whales 1. The tide goes out suddenly,【T1】______ the whales【T1】______ 2. Mass strandings linked to parasites a
Mass Strandings of Whales 1. The tide goes out suddenly,【T1】______ the whales【T1】______ 2. Mass strandings linked to parasites a
admin
2017-02-18
25
问题
Mass Strandings of Whales
1. The tide goes out suddenly,【T1】______ the whales【T1】______
2. Mass strandings linked to parasites
a. Evidence: Stranded animals infested with many parasites
b. Example: Worms found in the ears of dead whales
Whales rely heavily on their hearing to 【T2】______【T2】______
This type of infestation can be very harmful
3. Mass strandings related to toxins or poisons
Toxins【T3】______ from plants or animals 【T3】______
The whale ingests these toxins
Whether leading to stranding or not depends upon the toxin【T4】______【T4】______
4. Mass strandings caused by following their prey ashore
Example:【T5】______whales beached after following the squid ashore 【T5】______
Not true for most mass strandings
The animals’ stomach【T6】______ reveal most had not been feeding 【T6】______
5. Mass strandings linked to humans
A growing concern: loud【T7】______made by humans cause strandings 【T7】______
Noises caused by【T8】______are of particular concern【T8】______
6. Mass strandings related to group【T9】______ 【T9】______
Whales follow【T10】______ leaders ashore【T10】______
【T10】
Mass Strandings of Whales
Good afternoon everyone. Well, with some of you will go out on fieldwork it’s timely that in this afternoon’s session I’ll be sharing some ideas about the .reasons why groups of whales and dolphins sometimes swim ashore from the sea right onto the beach and, most often, die in what were known as "mass stranding". Unfortunately, this type of event is a frequent occurrence in some of the locations that you’ll be travelling to, (1) where sometimes the tide goes out suddenly, confusing the animals.
However, there are many other theories about the causes of mass strandings. The first is that the behavior is linked to parasites. It’s often found that stranded animals were infested with large numbers of parasites. For instance, a type of worm is commonly found in the ears of dead whales. (2)Since marine animals rely heavily on their hearing to navigate, this type of infestation has the potential to be very harmful. Another theory is related to toxins, or poisons. These have also been found to contribute to the death of many marine animals. (3)Many toxins, as I’m sure you’re aware, originate from plants, or animals. The whale ingests these toxins in its normal feeding behavior but (4)whether these poisons directly or indirectly lead to stranding and death, seems to depend upon the toxin involved. Alternatively, it has also been suggested that some animals stranded accidentally by following their prey ashore in the confusion of the chase. Last year, (5)David Thurston monitored pilot whales that beached after following the squid ashore. However, this idea does not seem to hold true for the majority of mass strandings (6)because examination of the animals’ stomach contents reveal that most had not been feeding as they stranded. There were also some new theories, which link strandings to humans. (7)A growing concern is that loud noises in the ocean cause strandings. (8)Noises such as these caused by military exercises are of particular concern and have been pinpointed as the cause of some strandings of late.
(9)A final theory is related to group behaviour, and suggests that sea mammals cannot distinguish between sick and healthy leaders and (10)will follow sick leaders, even to an inevitable death. This is a particularly interesting theory since the whales that are thought to be most social—the toothed whales—are the group that strand the most frequently. The theory is also supported by evidence from a dolphin stranding in 1994. Examination of the dead animals revealed that apart from the leader, all the others had been healthy at the time of their death.
Without one consistent theory however it is very hard for us to do anything about this phenomenon except to assist animals where and when we can. Stranding networks have been established around the world to aid in rescuing animals and collecting samples from those that could not be helped. I recommend John Connor’s Marine Mammals Ashore as an excellent starting point if you’re interested in finding out more about these networks, or establishing one yourself.
选项
答案
sick
解析
本题与鲸鱼跟随哪种领头者搁浅相关。录音提到,鲸鱼无法区分生病的和健康的领头者,因而可能会跟随不健康的领头者而搁浅,故答案填入sick。
转载请注明原文地址:https://kaotiyun.com/show/KuJK777K
0
专业英语四级
相关试题推荐
Thanksinparttotechnologyanditsconstantsoundingandringing,roughly41millionpeopleintheUnitedStates—nearlyathir
Thestudentshaveexpectedforthewinterholidaysfortheywanttoexperiencethefeelingthatworkis______intomoney.
LadyGaga’snewalbum______tonumberoneintheUKOfficialChart.
Adevelopingcountryusuallyreceivesmorepublicaidsthan______adevelopedcountry.
Mostmathematicianstrusttheir______insolvingproblemsandreadilyadmittheywouldnotbeabletofunctionwithoutit.
[A]addicts[B]adjustments[C]administration[D]amazing[E]bother[F]compares[G]conserves[H]constantly[I]dominant[J]eliminate[K]laun
A、Nothingwaspleasant.B、Sheearnedtoolittle.C、Shefelttiredandsick.D、Shecouldgetfreefood.D
A、St.Ives.B、London.C、Salisbury.D、BathC①选项都是表示地点的名词,听音时留意并记录地点的有关信息。②男士想要了解本学期安排在周末的旅行有哪些,女士提供了相关信息。四个选项中的地点女士都有提到,但是安排在3月18
A、Goingouttoabarafterworktoday.B、GoingoutforapicnicnextSaturday.C、GoingforadinnerthisSunday.D、Goingtoacl
随机试题
A.中心型脊柱椎体结核B.边缘型脊柱椎体结核C.脊柱肿瘤D.椎间盘突出症中青年多见,无骨质破坏,椎体边缘增生,椎间隙变窄见于
下列肝炎中属于有缺陷的RNA病毒的是
()是一国的中央和地方各级政府按照税种划分财政收入的一种预算管理体制。
【2015年真题】教育费附加是以纳税人实际缴纳的()税额之和作为计税依据。
甲公司向乙公司发出要约,购买一批建筑材料。乙公司作出承诺后,由于原材料价格飞涨而拟撤回承诺。下列说法不正确的是()。
某炒货厂为了便于联系业务,聘请某果品公司招待所干部马某当业务顾问并付津贴。马某背着公司领导私自以公司的名义与炒货厂签订了一份购销傻子瓜子合同,并采取欺骗手段偷盖了公司的印章。合同签订后,马某又拿着合同到公司下属单位,要求其下属单位按合同接受炒货厂的货物。其
悲悯生命毕淑敏科技发展了.现代人读的是电子读物,乘的是波音飞机。作家,比以前不好当。你能看到的书.他人也能看到。你能参观的自然景点异域风光,别人也许去过得更早更多
衡量教师是否胜任本职工作的基本条件是()
强调青年期是“心理、生物学因素”和“心理、社会学因素”的综合作用时期的是哪位心理学家?()
下列程序段运行结束后,变量c的值是( )。a=24b=328selectcaseb\10 case0 c=a*10+b case1to9 c=a*100+b case10to99 c=
最新回复
(
0
)