首页
登录
职称英语
It’s a good idea to apply sunscreen before heading to the beach if you don’t
It’s a good idea to apply sunscreen before heading to the beach if you don’t
游客
2023-08-16
14
管理
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 [br] 【C8】
选项
答案
B
解析
空格在be动词和副词gradually之后,推断此处应为分词或形容词,说明现在臭氧层(ozone layer)所处的状态。通常指负面影响的consequences提示填入空格的词应为贬义词,因此选用diminishing,表明臭氧层正在逐渐变小,保护地球免受紫外线辐射的作用也在减小。
转载请注明原文地址:https://tihaiku.com/zcyy/2932307.html
相关试题推荐
[originaltext]M:Alexandra,wheredidyouworkbefore?W:Iworkedatanairpor
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
[originaltext]Goodmorning,class.Beforewebegintoday,Iwouldliketoa
[originaltext]Goodmorning,class.Beforewebegintoday,Iwouldliketoa
[originaltext]Goodmorning,class.Beforewebegintoday,Iwouldliketoa
随机试题
[originaltext]WilliamShakespearewaschristenedinthemarkettownofStr
Thereisnodenyingthatourworldisbecomingmoreandmoredeveloped.Due
绝句二首(其二) [唐]杜甫 江碧鸟逾白,山青花欲燃。 今春看又过,何日是
如图所示系统中,k1=2×105N/m,k2=1×105N/m。激振力F=200
历史教学中的图文示意法( )。A.能辅助任何知识类型的学习 B.与新课程教
学生在某一-学科期中和期末考试的成绩波动很大,说明测验的信度很低。()
企业的生产计划一般分为()。A.年度生产计划 B.战略生产计划 C.中
固定成本是总成本费用的一部分,它是指其中的:A.不随产量变动而变动的费用 B.
甲施工企业将承包的工程全部委托乙施工企业施工,因此出现的工程质量缺陷应当由(
4岁男孩,妈妈在给穿衣服时牵拉左腕。患儿突然大哭,左肘功能障碍,左手不肯拿取玩物
最新回复
(
0
)