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
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] 【C8】
选项
答案
B
解析
空格在be动词和副词gradually之后,推断此处应为分词或形容词,说明现在臭氧层(ozone layer)所处的状态。通常指负面影响的consequences提示填入空格的词应为贬义词,因此选用diminishing,表明臭氧层正在逐渐变小,保护地球免受紫外线辐射的作用也在减小。
转载请注明原文地址:https://tihaiku.com/zcyy/2937052.html
相关试题推荐
[originaltext]M:IhadprepareddinnerforeightpeoplebeforeMarycalledands
[originaltext]M:IhadprepareddinnerforeightpeoplebeforeMarycalledands
July11Ileftonmytriptoday.Havingbeenoverseasbefore,Ifeltsom
July11Ileftonmytriptoday.Havingbeenoverseasbefore,Ifeltsom
July11Ileftonmytriptoday.Havingbeenoverseasbefore,Ifeltsom
July11Ileftonmytriptoday.Havingbeenoverseasbefore,Ifeltsom
July11Ileftonmytriptoday.Havingbeenoverseasbefore,Ifeltsom
July11Ileftonmytriptoday.Havingbeenoverseasbefore,Ifeltsom
[originaltext]W:Doyouwantmetoexplainthesequestionsbeforetheexam?M:Wh
[originaltext]W:Doyouwantmetoexplainthesequestionsbeforetheexam?M:Wh
随机试题
Theproducersofinstantcoffeefoundtheirproductstronglyresistedinthe
TheIndustrialRevolutionstartedin______around1733andasnewinventionswer
Wal-MartTriestoFindItsCustomerForallitssucc
系统误差可利用修正值进行补偿,这种补偿并不完全。
能激动心脏β↓1受体,增加心肌收缩力,作用于α受体,增加收缩压且能舒张肾血管的药
某商品原价100元,3月价格下降了10%,4月价格又开始上涨,5月价格上涨到了
诊断类风湿关节炎的标准之一就是:每天晨僵持续时间至少1小时,病程至少( )。A
固定资产使用率指标的不足之处有( )。A.虽然固定资产基础可能相对较新,但有一
罂粟壳的用量规定是A.2~5g B.3~6g C.4~7g D.5~8g
固体废弃物处置场址选择时,Ⅱ类场地的要求包括()。A.应选在满足承载力要求
最新回复
(
0
)