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
2023-08-16
51
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/2932300.html
相关试题推荐
BeforehefoundedOculusVR,PalmerLuckeyworkedattheUniversityofSouth
BeforehefoundedOculusVR,PalmerLuckeyworkedattheUniversityofSouth
BeforehefoundedOculusVR,PalmerLuckeyworkedattheUniversityofSouth
[originaltext]BeforeItellyouabouttheinterestingdiscoveryrelatedto
[originaltext]M:Alexandra,wheredidyouworkbefore?W:Iworkedatanairpor
[originaltext]M:Alexandra,wheredidyouworkbefore?W:Iworkedatanairpor
[originaltext]Iamfiredupfortheyearthatstretchesoutbeforeus.That
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
It’sagoodideatoapplysunscreenbeforeheadingtothebeachifyoudon’t
随机试题
TheWorldoftheFlat-footedFlyGeorgePoinarhasbeenfasc
Alotofpeoplethinkthatsittingis【B1】______ontheirbacksthanstanding
夜间尾随前车行驶时,后车可以使用远光灯。()
《安全生产法》对安全事故等级的划分标准中重大事故是指()。A.造成30人及以上
细胞周期包括_____和_____两个时期。
【教学过程】 环节一:导入新课 你知道吗?工农业生产中,电磁起重机都能吊起很重的物体。(观看录像)同学们思考一下,这个电磁起重机用的是永磁体吗?为什么?
物种指的是A.资源处于衰竭状态的重要野生药材物种 B.严禁采猎品种 C.资源
男性20岁,发热寒战3天,体温39.5℃,胸部X线示右上肺大片阴影,痰涂片见较多
A.磺胺嘧啶 B.磺胺醋酰 C.诺氟沙星 D.甲氧苄啶 E.四环素用于治
A.刺激咽部引起呕吐反射 B.按压颈动脉窦 C.安装人工心脏起搏器 D.非
最新回复
(
0
)