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
2023-08-11
33
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] 【C3】
选项
答案
F
解析
虽然空格前的defense是名词,但从句宾语部分意思仍未完整,因此空格应该还是名词,被defense修饰作句子宾语。此处应选mechanism,表明鲸鱼自身拥有防晒的“保护机制”。
转载请注明原文地址:https://tihaiku.com/zcyy/2918003.html
相关试题推荐
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That’sb
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That’sb
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That’sb
[originaltext]Milkwasabasicfoodofmanlongbeforehistorywaswritten.
[originaltext]Milkwasabasicfoodofmanlongbeforehistorywaswritten.
[originaltext]Milkwasabasicfoodofmanlongbeforehistorywaswritten.
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
随机试题
Describeatimewhenyouhelpedsomeone.Youshouldsay:whoyouhelpedandwhy
下列属于可以获得实用新型专利权的主题是()。A.一种经批准用于国防安全而设计
下述哪种药物与氨基糖苷类抗生素合用可能出现呼吸抑制或呼吸停止()A:西咪替丁
下列关于商业银行经济资本的描述,最恰当的是( )。A.经济资本主要用于应对风险
下列关于信托法律关系的主体,说法错误的是()。A.信托法律关系的主体一般包
建设工程项目信息管理手册的主要内容包括( )等。A、信息的编码体系和编码 B
发霉花生产生的毒素与下列哪种肿瘤关系最为密切()。A.原发性肺癌 B.食管癌
2009-74.天枢穴的定位是 A.脐旁0.5寸B.脐旁1寸C.脐旁2寸
史学原以记述近现代事实为主要任务,任何时代的近现代史都是史学家的研究中心。史学容
(2018年真题)下列民事主体中,属于特别法人的是( )。A.特殊的普通合伙企
最新回复
(
0
)