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
44
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
While(wait)______there,hesawtwobeautifulgirlscomeoutofthebuilding.w
ThePleasureofWalkingWalkinggivesusbackoursenses
Top10ReasonsforAfricanAmericanStudentstoGoAbroadBefore
作为咨询心理学产生的前提学术条件,1908年,促进了职业指导运动行为的心理学家是
下列损伤哪项属于闭合性软组织损伤( )A.擦伤 B.烧伤 C.挫伤 D.
学前儿童心理学研究对象是( )年龄范围内的儿童心理发展规律。A.0~3岁 B.
中国首位获国际安徒生儿童文学提名奖的童话作家是()。 A.陈伯吹B.周锐
图示(a)、(b)两截面,(a)为带矩形孔的圆形,(b)为带圆孔的正方形,u、ν
某铁矿一立井井筒深度560m,井筒净直径6m,该立井掘进最适宜的通风方式是()。
某民用建筑工程,建筑面积4000㎡,地下2层,箱形基础,地上13层,
最新回复
(
0
)