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
65
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/2918006.html
相关试题推荐
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That’sb
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That’sb
[originaltext]Milkwasabasicfoodofmanlongbeforehistorywaswritten.
[originaltext]Milkwasabasicfoodofmanlongbeforehistorywaswritten.
[originaltext]Milkwasabasicfoodofmanlongbeforehistorywaswritten.
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
随机试题
TheU.S.DepartmentofLaborstatisticsindicatethatthereisanoversuppl
【S1】[br]【S9】去掉of本题考查形容词aware的用法。beawareofsth.和beaware十that从句。
A.脂肪 B.维生素B1 C.碳水化合物 D.蛋白质 E.维生素A能量密
普通硅酸盐水泥的掺合料可以是()。A.粒化高炉矿渣 B.石灰石 C.粉煤灰
学习动机的两个基本成分包括()。A.学习需要 B.学习期待 C.学习氛围
招标文件中,由于各种管理要求、管理价格的制定都具有(),所以过一段时间可能需要调
《最高人民法院关于适用若干问题的解释(二)》第十九条规定:“对于合同法第七十四条
贮藏中颜色由浅变深的中药饮片有A.山药 B.白芷 C.泽泻 D.天花粉
粤港澳大湾区的战略定位()。A.充满活力的世界级城市群 B.具有全球影响
某厂燃煤锅炉烟气排放量为2×104m3/h,SO2浓度为800mg/m3,排放浓
最新回复
(
0
)