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
Worldwide there are probably 70 to 100 shark attacks annually resulting in about 5 to 15 deaths. We say "probably" because not a
Worldwide there are probably 70 to 100 shark attacks annually resulting in about 5 to 15 deaths. We say "probably" because not a
admin
2018-08-14
23
问题
Worldwide there are probably 70 to 100 shark attacks annually resulting in about 5 to 15 deaths. We say "probably" because not all shark attacks are reported: our information from Third World countries is especially poor, and in other areas efforts are sometimes made to keep attack quiet for fear of bad publicity. Historically the death rate was much higher than today, but the presence of readily available emergency services and improved medical treatment has greatly reduced the chances of deaths. Actual numbers of shark attacks certainly are going up each decade because of increasing numbers of bathers in the water, but there is no indication that there is any change in the rate of attack.
By far the most common shark attacks are "hit and run". These typically occur in the surf zone where swimmers and surfers are the normal targets. The victim seldom sees its attacker and the shark does not return after a single bite or wound. In most instances, these probably are cases of mistaken
identity
that occur under conditions of poor water visibility and a harsh physical environment. A feeding shark in this habitat must make quick decisions and rapid movements to capture its traditional food items. Sharks might occasionally misinterpret a human for its normal prey(猎物). We suspect that, upon biting, the shark quickly realizes that the human is a foreign object, or that it is too large, and immediately releases the victim and does not return.
Some of these attacks could also be related to social behaviors unrelated to feeding, such as dominance behaviors seen in many land animals. Injuries to "hit and run" victims are usually confined to relatively small cuts, often on the leg below the knee, and are seldom life-threatening.
What is mainly described in Paragraph 2?
选项
A、How and why sharks "hit and run".
B、How people can predict the attack.
C、How traditional prey is captured.
D、Why the human is a foreign object.
答案
A
解析
转载请注明原文地址:https://kaotiyun.com/show/IdCO777K
0
成人本科学位英语
相关试题推荐
Hisgoalisnottobecomeasportsman______achampioninacertainfield.
MoviesarethemostpopularformofentertainmentformillionsofAmericans.Theygotothemoviestoescapetheirnormaleveryd
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleusemoneytobuyfood,furniture,books,bicyclesand
Todayanyonewillacceptmoneyinexchangeforgoodsandservices.Peopleusemoneytobuyfood,furniture,books,bicyclesand
Telecommuting—substitutingthecomputerforthetriptothejob—hasbeenhailedasasolutiontoallkindsofproblemsrelatedt
OnNovember19,1863,AbrahamLincolnwenttoGettysburginPennsylvaniatospeakattheNationalSoldiersCemetery.TheCivilW
AsyouarestudentsofEnglish,it’sverypossiblethatyou’11beinterestedinEngland.That’swherethelanguagewasfirst
Thegovernmenthad______thempermissiontoleavethecountry.
—Whynothaveanewmachinedesigned?—______.I’llhavesomeonedoitsoon.
A70-footfishingboat,theSharkCatcher,sank5milesfromshoretodayinthePacificatabout4:30p.m.Theboatwasreturnin
随机试题
电子现金的支付过程包括()
会计电算化环境下,记账凭证摘要可以()。
《荀子·劝学》中说:“学不可以已。青,取之于蓝,而青于蓝;冰,水为之,而寒于水。”这句话主要体现出的哲学原理是()。
我们鼓励社会阶层自然分化,让不同阶层________。我们也鼓励鲤鱼跳龙门,但也应该看到能跃过龙门的“鲤鱼”毕竟是少数。这就需要构建更加公平正义的社会选择机制、甄别机制。只要是锥子,就可以冒出头,当然你也可以__________,让自己冒出头。填入画横线部
简述我国公务员培训的类型。
北京市为缓解交通压力实行机动车辆限行政策,每辆机动车周一到周五都要限行一天,周末不限行。某公司有A、B、C、D、E五辆车,保证每天至少有四辆车可以上路行使。已知:E车周四限行,B车昨天限行,从今天算起,A、C两车连续四天都能上路行使,E车明天可以上路。由此
食品添加剂是为改善食品品质和色、味,以及为防腐、香、保鲜和加工工艺的需要而加入食品中的人工合成或者天然物质营养强化剂、食品用香料、胶基糖果中基础剂物质、食品工业用加工助剂也包括在内。凡是不在《食品添加剂使用标准》(GB2760)名单中的物质都不是食品添加剂
下面对朝向反射的描述,正确的是()
执行x$一InputBox(“请输人x的值”)时,在弹出的对话框巾输入123,在列表框Listl中选中一个列表项(数据为456),使结果为123456的语句是()。
Womenmakeuponly14percentoffullprofessorsinU.S.economicsdepartments.Instarkcontrasttoothersocialscienceswher
最新回复
(
0
)