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
2024-04-10
9
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/3548562.html
相关试题推荐
[originaltext]Beforeanewairlinergoesintoservice,everypartofitis
[originaltext]Beforeanewairlinergoesintoservice,everypartofitis
[originaltext]W:Doyouwantmetoexplainthesequestionsbeforetheexam?M:
[originaltext]W:Doyouwantmetoexplainthesequestionsbeforetheexam?M:
[originaltext]W:Doyouwantmetoexplainthesequestionsbeforetheexam?M:
[originaltext]W:Doyouwantmetoexplainthesequestionsbeforetheexam?M:
Newtechnologylinkstheworldasneverbefore.Ourplanethas【B1】______.It
Newtechnologylinkstheworldasneverbefore.Ourplanethas【B1】______.It
Newtechnologylinkstheworldasneverbefore.Ourplanethas【B1】______.It
Newtechnologylinkstheworldasneverbefore.Ourplanethas【B1】______.It
随机试题
Americanstodaydon’tplaceaveryhighvalueonintellect.Ourheroesareat
Itshouldnotbeasurprise.Lonelinessa
A.PAS阳性 B.POX阳性 C.NAP强阳性 D.非特异性酯酶阳性,能
玻璃钢防眩板的厚度t为()。A.1.5~3.0mm B.2.0~3.5m
A公司发行面值100元的优先股,年股息率为5%,该优先股发行价为110元,筹资费
项目总承包方项目管理工作涉及项目()的全过程。A、决策阶段 B、实施阶段
下列片剂中不需要加入崩解剂的是A.肠溶片 B.泡腾片 C.植入片 D.咀嚼
A.社区保健服务B.社区慢性疾病患者的护理及管理C.社区健康教育D.社区急、重症
《证券公司风险控制指标管理办法》建立了以()为核心的风险控制指标体;。A:注册资
下列各项中,企业应在资产负债表日将持有的交易性金融资产公允价值高于账面余额的差额
最新回复
(
0
)