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
2023-08-14
36
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 C) 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] 【C5】
选项
答案
G
解析
空格在主语和谓语之间,故应为副词。本句提到抹香鲸体内的蛋白质可以保护它们不受紫外线的侵害。effectively符合句意。表明这种蛋白质的保护作用很“有效”。
转载请注明原文地址:https://tihaiku.com/zcyy/2924244.html
相关试题推荐
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
[originaltext]Goodmorning,class.Beforewebegintoday,Iwouldliketoa
[originaltext]Goodmorning,class.Beforewebegintoday,Iwouldliketoa
随机试题
Whenwewantto【C1】______otherpeoplewhatwethink,wecandoitnotonlyw
Usually,therearetworeasonstopursuescientificknowledge:forthesake
Next,let’stalkaboutearthquakesonourPlanet.Somecountrieshavelarge
Fearoffailurecannegativelyaffectpeopleinmanywaysandcausethemto
在我国,新闻舆论监督主要是A.对党和政府工作的监督 B.对国家公务人员的监督
A.括约肌控制训练 B.排尿反射训练 C.手法排尿训练 D.出入水管理制度
下列各项中,不符合内部牵制的要求的是()。A、出纳人员管票据 B、出纳人员
跟据海关规定,无需办理报关注册登记许可,可直接向海关办理报关注册登记的单位有(
某工程在实施过程中发生如下事件: 事件l:由于工程施工工期紧迫,建设单位在
A.妊娠10周 B.妊娠12周 C.妊娠20~24周 D.妊娠18~20周
最新回复
(
0
)