首页
外语
计算机
考研
公务员
职业资格
财经
工程
司法
医学
专升本
自考
实用职业技能
登录
专升本
Most animals have little connection with animals of a different kind, unless they hunt them for food. Sometimes, however, two ki
Most animals have little connection with animals of a different kind, unless they hunt them for food. Sometimes, however, two ki
admin
2010-07-11
76
问题
Most animals have little connection with animals of a different kind, unless they hunt them for food. Sometimes, however, two kinds of animals come together in a partnership which is good for both of them. You may have noticed some birds sitting on the backs of sheep. This is not because they want a ride, but because they find easy food in the parasites(寄生虫)on the sheep. The sheep allow the birds to do so because they remove the cause of discomfort. So, although they can manage without each other, they do better together.
Sometimes an animal has a plant partner. The partnership develops until the two partners cannot manage without each other. This is so in corals(珊瑚)of the sea. In their skins they have tiny plants which act as "dustmen" , taking some of the waste products from the corals and giving in return oxygen which the animal needs to breathe. If the plants are killed, or are even prevented from receiving light so that they can not live normally, the corals will die.
We learn from the text that corals depend on plants for ______.
选项
A、comfort
B、light
C、food
D、oxygen
答案
D
解析
转载请注明原文地址:https://kaotiyun.com/show/T8LC777K
本试题收录于:
英语题库普高专升本分类
0
英语
普高专升本
相关试题推荐
Haveyou【B1】______askedyourselfwhychildrengotoschool?Youwillprobablysaythattheygo【B2】______theirownlanguagea
Thereis______trafficonthestreetsaftertherushhour.
Thesestudiesgive______(leading)resultsbecausetheyhaven’tlookedatenoughcases.
______,we’dbettermakesomechangesintheplan.
IfeltsoembarrassedthatIcouldn’tdoanythingbut______therewhenIfirstmetmypresentboss.
"Igetbywithalittlehelpfrommyfriends"isapopularlyric(抒情诗)withage-oldwisdombehindit.【B1】______peopleneedpeop
I______anoldclassmateofmineyesterdayevening.
Thepeopletherewillpaytwoorthreetimesasmuchastheyusedtopayforahouse.
TheharderItried,______itseemedtosolvethatmathproblem.
Rodisdeterminedtogetaseatfortheconcert______itmeansstandinginaqueueallnight.
随机试题
律师调查取证权
下列各项中,不属于小儿病理特点的是()
甲公司在纸手帕等纸制产品上注册了“茉莉花”问题及图形商标。下列哪些未经许可的行为构成侵权?(2007年卷三第61题)
某零售商店采用售价金额核算,2016年9月5日购进B商品一批,进价10000元,支付的进项税额为1700元,款项通过银行转账,该批商品的含税售价为14000元;9月20日,该批商品全部售出并收到货款,增值税税率为17%,假设9月份无期初同类商品的存货。
下列各项中,符合上市公司向原股东配售股份条件的有()。
(2015年真题)某公安局官方微博公布了演员甲因容留他人吸毒被抓的消息,一知名记者在其博客上转载该消息,并上传了甲与艺人乙、丙一起赌博的照片。该记者的行为()。
Whatdoesthemanusuallydointhemorning?
DearMr.Cooper,ThankyouforyourMay18orderoffiveT-200printers.Unfortunately,theT-200hasbeendiscontinuedandisn
WhydoesJaneborrowTom’syogabook?
Commonindoorplantsmayprovetobeavaluableweaponinthefightagainstrisinglevelsofindoorairpollution.Those【C1】____
最新回复
(
0
)