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
49
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] 【C9】
选项
答案
J
解析
or提示填入空格的词可能是形容词或分词,与endangered并列;也可能是名词,与species并列。词库中的名词放人句中,句意不通。形容词vulnerable符合句意,表示逐渐减小的臭氧层对“脆弱的”物种会产生特别严重的影响。
转载请注明原文地址:https://tihaiku.com/zcyy/2918009.html
相关试题推荐
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That’sb
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That’sb
[originaltext]Milkwasabasicfoodofmanlongbeforehistorywaswritten.
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
Accustomedthoughwearetospeakingofthefilmsmadebefore1927as"silen
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
随机试题
Whendidthespeakerlearntosmoke?Thespeakerlearnstosmokeat______.[b
Procrastinators(拖延症患者),takenote:Ifyou’vetriedbuildingself-discipline
读图6分析下列问题。(13分) (1)气候类型①__________气候,
关于抗震设计的大跨度屋盖及其支承结构选型和布置的说法,正确的是( )。A.宜采
标准ASC11码字符集共有编码()个。A.128 B.52 C.34
脉冲多普勒检测卵巢恶性肿瘤流速曲线特点多为A.高速高阻 B.低速高阻 C.中
胃溃疡可出现A.多为上腹正中或偏右节律性疼痛 B.上腹持续性剧痛、放射至背后
SF6气瓶应放置在()的专门场所,直立保存,并应远离热源和油污的地方。阴凉干燥$
投资项目产品价格预测除了劳动生产率、成本和利润等情况外,更重要的是要考察()
某工程承包合同纠纷经第二审人民法院审理,裁定发回原审人民法院重审。下列不属于发回
最新回复
(
0
)