首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
外语
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, t
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, t
admin
2019-06-23
81
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
【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://kaotiyun.com/show/zjX7777K
0
大学英语六级
相关试题推荐
A、Heshouldstartwithalightworkout.B、Heshouldgotohaveacheck-up.C、Heshouldeatlessfattyfoods.D、Heshouldvisita
Childrenwholivenearamainroadareingreaterdangerofcatchingpneumonia(肺炎)becausepollutionfrompassingtrafficdamag
Afterdecadesofdecline,theshareofmotherswhostayhomewiththeirchildrenhas【C1】______risenoverthelastseveralyears
Afterdecadesofdecline,theshareofmotherswhostayhomewiththeirchildrenhas【C1】______risenoverthelastseveralyears
Afterdecadesofdecline,theshareofmotherswhostayhomewiththeirchildrenhas【C1】______risenoverthelastseveralyears
A、Toexplainitsspecialtyandfunction.B、Toshowshallow-wateranimalsarealsoamazing.C、Toexplainhowanimalsadapttosur
Whenfisherieshavesunkorcollapsed,oneapproachtofixthesituationistosetupamarinereservewherefishingisbanned.
Whenfisherieshavesunkorcollapsed,oneapproachtofixthesituationistosetupamarinereservewherefishingisbanned.
随机试题
根据罗伯特.卡茨的研究,管理者需要具备的技能不包括()。
Don’tworry.We’ll______allthedebtstoyouwithintwoyears.
以下关于储金球的说法中错误的是
甲、乙俩是夫妻,于2007年在A市结婚,2008年甲去美国留学,一去不返,下落不明。乙因难忍分离之苦,于2012年向人民法院提起离婚之诉。问:本案的管辖法院是()。
设随机变量X的密度函数为则X的分布函数为()。
某城市道路工程项目,施工图设计中要求基层采用石灰粉煤灰稳定砂砾,面层采用沥青混合料施工。在基层施工过程中的一些情况如下:(1)选用的粉煤灰中SiO2、Al2O3和Fe2O3的总含量为60%。(2)通过配合比试验确定相关的指标。(3)混合料拌成后的平均堆放时
【2014华夏银行】从所给的四个选项中,选择最合适的一个填入问号处,使之呈现一定的规律性()。
恪守新闻真实性,是新闻界共同的“铁律”,新闻的生命也在于此。任何细节的(),都是新闻工作的(),都是新闻工作者的()。填入划横线部分最恰当的一项是()。
设有关系R,S和T如下。关系T是由关系R和S经过()得到的。R
下列关于类成员的叙述中,正确的是()。
最新回复
(
0
)