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
2023-08-18
41
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] 【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://tihaiku.com/zcyy/2937050.html
相关试题推荐
[originaltext]W:Doyouwantmetoexplainthesequestionsbeforetheexam?M:
[originaltext]W:Doyouwantmetoexplainthesequestionsbeforetheexam?M:
[originaltext]W:Doyouwantmetoexplainthesequestionsbeforetheexam?M:
[originaltext]W:Doyouwantmetoexplainthesequestionsbeforetheexam?M:
[originaltext]W:Doyouwantmetoexplainthesequestionsbeforetheexam?M:
[originaltext]W:Doyouwantmetoexplainthesequestionsbeforetheexam?M:
[originaltext]M:IhadprepareddinnerforeightpeoplebeforeMarycalledand
[originaltext]M:IhadprepareddinnerforeightpeoplebeforeMarycalledand
[originaltext]M:IhadprepareddinnerforeightpeoplebeforeMarycalledand
Newtechnologylinkstheworldasneverbefore.Ourplanethas【B1】______.It
随机试题
(1)Imaginethatyoucouldrewindtheclock20years,andyou’re20yearsyoun
It’stemptingtospendslowworkdaysthisholidayseasonshoppingforgifts
患者,男性,68岁,脑梗死后2个月,用汉语失语成套测验评估时,发现患者自发语不流
男,60岁,晨练时晕倒在地,如果你恰在身边,判断患者心跳停止最简便迅速的方法是A
各省、自治区、直辖市的环境保护部门放射防护监督的对象是A.本辖区内的放射性同位
社区矫正的定位是“一个目标,两个方面”,其中“一个目标”指的是()。A.帮助
一般质量事故是指,造成()万元以上1000万元以下直接经济损失的事故。A、1
有一项年金,前3年无流入,后5年每年年初流入500万元,假设年利率为10%,已知
2015年末,某国未清偿外债余额为2000亿美元,其中,1年及1年以下短期债务为
同一厂家、同一类型、同一钢筋来源的成型钢筋,不超过30t为一批,每批中每种钢筋牌
最新回复
(
0
)