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] 【C1】
选项
答案
O
解析
空格在指示代词that之后,应为名词。that所指与上一句内容有关,指“去沙滩之前先涂上防晒霜”。此处应选择option,表示海洋动物“没有那样的选择”。mechanism通常用于指事物本身内在的机制,不适宜用于指代“涂防晒霜”,故排除。
转载请注明原文地址:https://tihaiku.com/zcyy/2918001.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
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
随机试题
Ifourbrainswerecomputers,we’dsimplyaddachiptoupgradeourmemory.
Accordingtotheauthor,recentOlympicGameshave______.[br]Whatdidtheman
Forthispart,youareallowed30minutestowriteashortessayonthetopicBr
Thefoodsupplywillnotincreasenearlyenoughtomatchtheincreaseofpopulat
A——touristcouncilB——touristauthority/officeC——touris
下列劳动争议调解委员会不能调解的劳动争议是()。A.开除争议 B.工资争议
2009-110.治疗眩晕肝阳上亢证,应首选 A.天麻钩藤饮B.四逆散C
立井井筒基岩施工中的防治水方法有( )。A.地面预注浆 B.吊泵排水 C.
丙基硫氧嘧啶治疗甲亢过程中,需停药处理的是A.规则用药已6个月,甲亢仍未控制
科目汇总表账务处理程序的优点之一是能够大大减少登记总分类账的工作量。()
最新回复
(
0
)