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
2017-02-01
32
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 G)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
【C6】
选项
答案
A
解析
根据空格后面的内容“人体如何产生抗氧化剂以应对造成大量遗传细胞损伤的分子”可知,本句类比了抹香鲸和人类自身的防护机制,故填入空格的词应含“类似”的意思,similar符合句意。
转载请注明原文地址:https://kaotiyun.com/show/PqF7777K
0
大学英语六级
相关试题推荐
A、TheyareancestoroftheAsianpeople.B、TheyhavealwaysbeeninAmerica.C、TheyareofMongoloidrace.D、Theyimmigratedto
Agroupofspermwhalesappeartohavetakeninadeformedbottlenosedolphin,marineresearchershavediscovered.Behaviora
Agroupofspermwhalesappeartohavetakeninadeformedbottlenosedolphin,marineresearchershavediscovered.Behaviora
Agroupofspermwhalesappeartohavetakeninadeformedbottlenosedolphin,marineresearchershavediscovered.Behaviora
Agroupofspermwhalesappeartohavetakeninadeformedbottlenosedolphin,marineresearchershavediscovered.Behaviora
Agroupofspermwhalesappeartohavetakeninadeformedbottlenosedolphin,marineresearchershavediscovered.Behaviora
MoreandmorepeoplearetakingtheirtabletcomputerstobedtosurftheweborcheckFacebookore-mailsbefore【B1】_____thel
A、Thewomanshouldalwaysmakecomplaints.B、Thewomanshouldthinkfromtheboss’sstandpoint.C、Thewomanmaygetapayrises
A、Heshouldapplyforaprivateschool.B、Heshouldapplyforapublicschool.C、Heshouldconsiderschooladministrationandte
随机试题
什么是概率分布?
商标不得使用下列文字、图形()
成人缺铁性贫血最常见的原因是()
下列脉象均主实证,除外()
根据《联合国国际货物销售合同公约》的规定,卖方必须承担哪些义务?()
目前,常用的施工进度计划图的表达方法有()。
审慎性原则要求公司内部控制的核心是风险控制,制定内部控制制度要以审慎经营,防范和化解风险为出发点。()
迅通通信设备有限公司是一家从事通讯设备和软件的研发和生产的高科技公司。随着通信行业的迅猛发展,公司在过去的几年中也发展迅速,由一个初步创立时只有30人的小型企业,逐步发展成现在的具有一定规模的中型企业。如果公司保持现在的发展速度,预计在今后的几年会发展为一
甲公司2010年发生下列各项交易或事项:(1)取得长期股权投资的现金股利200万元1(2)为购建固定资产支付专门借款利息60万元;(3)购买可供出售金融资产支付价款3000万元;(4)因固定资产毁损收取保险公司赔偿30万元;(5)以银行存款向税务
下列设备中,可以作为微机输入设备的是_______。
最新回复
(
0
)