Mostanimalshavelittleconnectionwithanimalsofadifferentk...
问题详情:
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 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 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 “dustmen”, 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 receiving light so that they cannot live normally, the corals will die.
1.Some birds like to sit on a sheep because _______.
A.they can eat its parasites
B.they enjoy travelling with the sheep
C.they depend on the sheep for existence
D.they find the position most comfortable
2.The underlined word “they” in the last sentence of the first paragraph refers to _______.
A.birds and parasites B.birds and sheep
C.parasites and sheep D.sheep, birds and parasites
3.We learn from the text that corals depend on plants for _______.
A.comfort B.light C C.food D.oxygen
4.What does the second paragraph mainly discuss?
A.Some animals and plants depend on each other for existence.
B.Some animals and plants develop their relationship easily.
C.Some plants depend on each other for food.
D.Some animals live better together.
【回答】
1.A 2.B 3.D 4.A
知识点:阅读理解
题型:未分类
-
设复数(是虚数单位),则复数的虚部为( )A. B. C. ...
问题详情:设复数(是虚数单位),则复数的虚部为( )A. B. C. D.【回答】B知识点:数系的扩充与复数的引入题型:选择题...
-
蜡烛燃烧刚熄灭时产生的白*是什么?提出问题:蜡烛刚熄灭时,总会有一缕白*冒出,它的成分是什么呢?猜想与假设:A...
问题详情:蜡烛燃烧刚熄灭时产生的白*是什么?提出问题:蜡烛刚熄灭时,总会有一缕白*冒出,它的成分是什么呢?猜想与假设:A.白*是燃烧时生成的二氧化碳;B.白*是燃烧时生成的水蒸气;C.白*是石蜡蒸气凝成的石蜡固体小颗粒进行实验:⑴吹灭蜡烛,立即用一个蘸有澄清石灰水的烧杯罩住白...
-
根据句意及首字母,写出单词,使句子意思完整1.Mym________birthdayisDecember13t...
问题详情:根据句意及首字母,写出单词,使句子意思完整1.Mym________birthdayisDecember13th.2.Ilikep________music.3.Shew________toplaybaseball.4.Thelittleboywantssomec________.5.MissWangiso________musicteacher.6.Doyouwanttoplaywiththedogn________?7.Let'sp_...
-
下列与实验相关的叙述正确的是 A.稀释浓硫*时,应将蒸馏水沿烧杯内壁缓慢地注入浓硫*中B.配制溶液时,若加水...
问题详情:下列与实验相关的叙述正确的是 A.稀释浓硫*时,应将蒸馏水沿烧杯内壁缓慢地注入浓硫*中B.配制溶液时,若加水超过容量瓶刻度,应用胶头滴管将多余溶液吸出C.配制1mol·L-1300mLNaCl溶液可以选择一个50mL的容量瓶和一个250mL的容量瓶D.可以用右图装置进行*气的...
相关文章
- 阅读理解。Vienna,thecapitalofAustria(奥地利)isknownasthecityofm...
- Forthosewhostudythedevelopmentofintelligence(智力)inthean...
- 改错:Thatlittleactofkindmadeeveryonewhosawitfeelgood—buti...
- OneweekendinMay2015,over48centimetersofrainfellinHousto...
- Whenitcomestothebenefitofvolunteering,alotofpeoplethink...
- Whenitcomestobenefitsofvolunteering,alotofpeoplethinkit...
- —IlovetheInternet.I'vecometoknowmanyfriendsontheNet.—
- It'slateeveninginthemiddleofthewinter.Thesnowisdeep,but...
- Thelittleboyoftentoldtheliethat“Wolvesarecoming”,
- Generally,students'innermotivationwithhighexpectationsf...