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
2011-05-26
32
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(伙伴关系) which does good to 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 parasites(寄生虫) on 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 relationship develops until the two partners cannot manage without each other. This is so in the corals (珊瑚) of the sea. In their skins they have tiny plants which act as "dustman", taking some of the waste products from the coral and giving in return oxygen which the animal needs to breathe. If the plants are killed, or are even prevented from light so that they cannot live normally, the corals will die.
It can be learnt from the text that the coral depends on the plant 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://jikaoti.com/ti/HC4GFFFM
本试题收录于:
英语题库成考专升本分类
0
英语
成考专升本
相关试题推荐
Mrs.Smithtreatedherlittledogquite______.Thebutcherdidnotgiveanymeattothedog______.
Mrs.Smithtreatedherlittledogquite______.Itseemedthatthedogknewwellthatthepaperitsmastergaveit______.
Thestudentshavenodifficulty______theexercise.
Wewerecompletely______whenwefinallyreachedthedestination.
Whendreaming,however,onetendstobelievefullyintherealityofthedreamworld,(howeverinconsistent,illogicalandoddi
Thispassageismainlyabouthowto______WhichofthefollowingisNOTmentionedforfastreadingpurpose?
Therewere______opinionsastothebestlocationforthenewschool.
Howcanasinglepostagestampbeworth$16,800?Anymistakemadeintheprintingofastampraisesitsvaluetostampcoll
Carsmovedvery.slowlyinthe1920s,butthey______morequicklythaninthe1910s.
He______abook,andnowheneedsaholiday.
随机试题
立案
堆焊用的碳化钨,可分为()碳化钨。
鲁迅的小说《伤逝》的主人公是涓生和_______。
运动节段是指
按照《物权法》的规定,建设用地使用权自()时设立。
某公司在评价员工时,将员工分为“优秀员工”、“合格员工”和“不合格员工”三类,通常三类员工的比例分别为10%、85%和5%。在绩效考评末期,部门主管通常与员工有一次正式的评价会见,对于不合格员工,给予必要的培训和指导,并提醒如果其不提高业绩将会有被解雇的风
某报社记者深度采访后,报道了A上市公司(简称A公司)上市前改制重组以及上市后发生的系列情况:(1)A公司是于2007年在对B有限责任公司(简称B公司)整体改制的基础上设立的股份有限公司。B公司改制时,以其截止于2007年6月31日经审计确认的净资
根据下列资料,回答下列问题。据国家统计局披露,2016年1—7月,新能源发电量增长19.2%。1—7月,新能源发电量占全部发电量的比重为8.8%,核电、风电和太阳能发电占全部发电量比重分别为3.45%、3.74%和0.64%,其中风电比上年同期提高0.
现代医学科学认为:人全身血液循环的速度与肌肉及大脑神经紧张程度成反比;肌肉及神经紧张,血管受到挤压,会使血液流量减少,而造成局部缺血缺氧。当肌肉及大脑神经紧张度较平时增加60%以上时,其局部血液流动可全部中断。当今所有的疾病中,60%~80%可以从现代生活
声音信号的数字化过程包括采样、(12)和编码。
最新回复
(
0
)