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
2023-08-13
31
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] 【C7】
选项
答案
K
解析
空格在less和介词of之间,应为名词。本段主要讲皮肤黑色素(melanin)含量的多少决定mtDNA受损的程度。填入空格的词应与amount近义,content“含量”符合句意。
转载请注明原文地址:https://tihaiku.com/zcyy/2922609.html
相关试题推荐
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
[originaltext]Goodmorning,class.Beforewebegintoday,Iwouldliketoa
[originaltext]Goodmorning,class.Beforewebegintoday,Iwouldliketoa
[originaltext]Goodmorning,class.Beforewebegintoday,Iwouldliketoa
[originaltext]Goodmorning,class.Beforewebegintoday,Iwouldliketoa
[originaltext]Goodmorning,class.Beforewebegintoday,Iwouldliketoa
[originaltext]Goodmorning,class.Beforewebegintoday,Iwouldliketoa
[originaltext]Goodmorning,class.Beforewebegintoday,Iwouldliketoa
随机试题
NarratorListentopartofaconversationbetweenastudentandaprofessor.Now
[originaltext]Hello,I’mCallumRobertsonandyou’relisteningtothemusicsho
动态范围调节
进行水泥混凝土抗折强度试验,首先应擦干试件表面,检查试件,如发现试件中部(
在建设项目中,根据签订的合同,具有独立的施工条件的工程为()。A.分项工程
2009年,某省全年粮食作物播种面积253.85万公顷,比上年增长1.5%
某省民政厅为了制定本省“十二五”时期的发展规划,需要采用抽样调查的方法,对本地区
在公司设立过程中,由于发起人的过失致使公司利益受到损失的,()。A、发起人可
下列关于工程项目绩效评价的表述中,错误的是() A.绩效评价是一种综合性的评
提高混凝土耐久性的方法可采用()方法。A.选用合适的水泥品种 B.采用细砂及粒
最新回复
(
0
)