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
2023-08-16
16
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] 【C7】
选项
答案
K
解析
空格在less和介词of之间,应为名词。本段主要讲皮肤黑色素(melanin)含量的多少决定mtDNA受损的程度。填入空格的词应与amount近义,content“含量”符合句意。
转载请注明原文地址:https://tihaiku.com/zcyy/2932306.html
相关试题推荐
[originaltext]M:Alexandra,wheredidyouworkbefore?W:Iworkedatanairpor
[originaltext]M:Alexandra,wheredidyouworkbefore?W:Iworkedatanairpor
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
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
Thepointoffactoryfarmingischeapmeat,madepossiblebyconfininglarge
Asmanypeoplehitmiddleage,theyoften
下列有关各类避震疏散场所的叙述,错误的是:()A.紧急避震疏散场所的服务半径
A.涩肠固脱,温中补虚B.涩肠固脱,温补脾肾C.温中补虚,固肠止泻D.涩肠止痢,
火灾报警控制系统动作时,检查对应部位并无火情存在,且按下“复位”键后不再报警,可
在流感流行的季节,有医学专家建议每天早餐必须吃一个鸡蛋,喝一杯牛奶,可以选择不喝
容易对人的心理产生影响的暂时性污染是( )。A.放射性物质污染 B.建筑施工
既能活血行气,又能利胆退黄的药物是A.川芎 B.延胡索 C.郁金 D.姜黄
某汽车运输公司2008年的车辆运用效率指标数据如下,日历天数365天、车辆工作率
市场出现无需求状态的原因有()。A.人们不了解产品 B.不习惯使用这种产品
最新回复
(
0
)