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
It’s a good idea to apply sunscreen before heading to the beach if you don’t want to burn. But for marine animals like whales, t
It’s a good idea to apply sunscreen before heading to the beach if you don’t want to burn. But for marine animals like whales, t
admin
2018-05-11
30
问题
It’s a good idea to apply sunscreen before heading to the beach if you don’t want to burn. But for marine animals like whales, they don’t have that【C1】______ Species like sperm whales can spend up to six hours at the ocean’s surface in between dives,【C2】______ in the sunlight. So how do they protect themselves from a serious case of sunburn?
It turns out that their bodies have a similar defense【C3】______ against the sun’s UV radiation as people. Blue whales—which have the lightest skin color of the three species—tan during their summer stay before【C4】______ back to their northern feeding grounds. Sperm whales don’t tan. They can receive an "overdose" of UV radiation during their hours at the ocean’s surface, and they have proteins that【C5】______ protect their cells from UV damage. This process is【C6】______ to how human bodies produce antioxidants in response to molecules that can cause a lot of genetic and cellular damage. And fin whales escape sun damage thanks to their high levels of melanin—a dark substance in the skin to protect humans from UV radiation.
Older whales and whales with less【C7】______ of melanin in their skin—like blue whales—had the greatest level of damage in their mtDNA. Fin whales, which had the greatest amount of melanin, had the least amount of mtDNA damage.
Now that the ozone layer that shields Earth from UV radiation is gradually【C8】______ it’s important to know what the consequences are for whales and dolphins, especially for【C9】______ or endangered species. Although it’s difficult to tell what causes many of these skin conditions, UV damage is one cause. Even though whales have【C10】______ defenses to UV radiation, high exposure can still be harmful.
A) similar B) diminishing C) liability D) migrating
E) mutual F) mechanism G) effectively H) jerking
I) instantaneously J) vulnerable K) content L) baking
M) inherent N) perspective O) option
【C2】
选项
答案
L
解析
空格所在句子主谓宾结构完整,且空格位于逗号后面,故应为分词作状语,说明鲸鱼在海面逗留六小时的状况。结合上文提到的关于“防晒”的内容,可以推断此处应该说鲸鱼每天“暴晒”六小时,故选baking最合适。
转载请注明原文地址:https://kaotiyun.com/show/R4T7777K
0
大学英语六级
相关试题推荐
Childrenwholivenearamainroadareingreaterdangerofcatchingpneumonia(肺炎)becausepollutionfrompassingtrafficdamages
WhenMomandDadGrowOld[A]Theprospectoftalkingtoincreasinglyfragileparentsabouttheirfuturecanbe"oneofthemost
A、Howimportantmoneyisinone’sday-to-daylife.B、Howonespendsmoneyshowswhatisimportanttohim.C、Moneyismoreimport
Theincreaseinglobaltrademeansthatinternationalcompaniescannotaffordtomakecostlyadvertisingmistakesiftheywantt
A、Takinggoodcareofourchildrentomakethemfeelhappy.B、Findingcolorfulextracurricularactivitiesforourchildren.C、Ed
A、Thedisadvantagesofsolarenergy.B、Thepollutionofotherenergysources.C、Therisingfuelcostsandfuelshortage.D、Thec
DoBritain’sEnergyFirmsServethePublicInterest?[A]Capitalismisthebestandworstofsystems.Lefttoitself,itwillemb
DoBritain’sEnergyFirmsServethePublicInterest?[A]Capitalismisthebestandworstofsystems.Lefttoitself,itwillemb
A、Reachingonlynineteenpercentoftheworld’spopulation.B、Neglectingagreatmajorityoftheworld’slanguages.C、Havingtoo
随机试题
A.推按阳溪穴B.捻、摇、拔伸法C.拔伸、按压、摇法D.一指禅推、按、揉、摇、擦法E.按压或敲击法
男性,63岁,糖尿病史15年,一直口服优降糖2.5mgTid和二甲双胍0.25gTid治疗,血糖控制尚可。1周前感冒后发热,并出现恶心、呕吐、意识障碍。查体BMI18.Skg/m2化验尿酮体(++),FBG28retool/L,K+3.5mmol/L,Na
患者,女,41岁。孕1产0,孕检各项指标正常,由于高龄初产,列为高危管理的范围。孕13周时,医生应建议做的特殊监护是
补体经典途径的成分包括
在年度开始,启用新账簿时,应把上年度的年末累计发生额和余额记人新账的第一行,并在摘要栏注明“上年结转”字样。()
理财规划师为了能更好的为客户制定汽车消费规划,应了解有关汽车消费贷款的知识,关于国内外汽车生产商均可提供消费信贷的好处,下列哪个说法不正确()。
劳动保障监察处罚的方式主要有责令用人单位改正及()共五种。
源于合同性权利的无形资产,其使用寿命不应超过合同性权利的期限。()
某学校挑选60名学生参加本市运动会,其中30人报田径项目,45人报球类项目,参加田径项目而未参加球类项目的有8人,则参加球类项目而未参加田径项目的学生有()名.
UnderitsCharter,thefirststatedaimoftheU.N.wasWhichofthefollowingistrueastotheessentialfunctionsoftheU.N
最新回复
(
0
)