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
61
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/2918008.html
相关试题推荐
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That’sb
[originaltext]Milkwasabasicfoodofmanlongbeforehistorywaswritten.
[originaltext]Milkwasabasicfoodofmanlongbeforehistorywaswritten.
[originaltext]Milkwasabasicfoodofmanlongbeforehistorywaswritten.
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
随机试题
【S1】[br]【S6】created∧Pat—by此句是说,早期著名的动画形象是FelixtheCat,它是由美国的PatSullivan在19
A.①控制器、②运算器、③存储器、④输入设备、⑤输出设备 B.①运算器、②控制
“一国两制”构想最初是为解决台湾问题而提出的。()
以下哪种情况下不适合采用标准的内部审计工作方案?A.经营环境比较稳定,变动极少
某混凝土试块强度值不满足规范要求,但经法定检测单位对混凝土实体强度经过法定检测后
病毒性心肌炎的病变包括( )。A.心肌细胞间质水肿 B.心肌间质内淋巴细胞、
下列表述不正确的是()。A.甲深夜潜入某户人家,正在撬保险柜时,听到户外有警车鸣
融资指一个企业资金筹集的行为与过程,可分为直接融资和间接融资。直接融资是不经金融
关于知识产权海关保护备案与申请扣留侵权嫌疑货物两者之间的关系,下列表述错误的是(
男,36岁。左上臂切割伤5小时。查体:T37.2℃,P70次/分,BP100/6
最新回复
(
0
)