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
外语
Most animals have little connection with animals of a different kind,/ unless they hunt them for food./ Sometimes, however, two
Most animals have little connection with animals of a different kind,/ unless they hunt them for food./ Sometimes, however, two
admin
2013-06-03
74
问题
选项
答案
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 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 the parasites 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 of the sea./ In their skins they have tiny plants which act as "dustman"/ 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 light so that they cannot live normally,/ the corals will die.
解析
转载请注明原文地址:https://kaotiyun.com/show/sNQK777K
0
专业英语四级
相关试题推荐
Somepeopleholdthat,sinceweliveinamoneyorientedsociety,theaverageindividualcareslittleaboutsolving_____problems
Amanshouldneverbeashamedtoshowhehasbeeninthewrong,______isbutsaying,inotherwords,thatheiswisertodaythan
Thedeanofourdepartmentproposedthatallthestudents______atthereceptionthisafternooninordertomeettherepresentat
Travelershadbettergottheirreservationswell______iftheywanttoflyduringtheChristmasholidays.
Manymuseumsnowprovideeducationalservicesandchildren’sdepartments.______theusualdisplays,theyalsoofferfilmshowings
Whatistheusageofthestandardweight?
FoodwasteinSeattleisfinallymadeintoakindof
Shereturnedfromlunchinahappierframeof_____.
You’dbetterhangupthisoil-paintingonthat______wall.
Theprisonershaveno______toatelephone.
随机试题
采用滴定法测定肉制品的过氧化值时,公式中过氧化值计算的换算因子为()。
______hardandyouwillsucceed!
诊断肾病综合征必须具备的依据是
患者男,19岁,学生。某日去邮局领取汇款300元,柜台上放着3张100元,一目了然,患者接过后便放进衣袋。一出邮局,觉此举过于疏忽,唯恐刚才数错了,便将钱拿出反复再数。又一转念,是否衣袋里原来就有1张100元的钞票呢?明知自己并没有弄错,但仍无法控制,为此
下列哪项不属于分散片的特点
某沥青软化点实测结果为55.4℃,试验结果应记作()。
下列项目中,不缴纳消费税的有( )。
股票是一种有价证券,它是股份有限公司和有限责任公司签发的证明股东所持有股份的凭证。()
甲公司2016年销售收入1000万元,变动成本率60%,固定成本200万元,利息费用40万元。假设不存在资本化利息且不考虑其他因素,该企业联合杠杆系数是()。
分数的合成方法包括()
最新回复
(
0
)