试题与答案

某草原上生活着鹿、兔、狼和狐等生物,雄鹿有角,雌鹿无角,通常情况下这种鹿的雌雄个

题型:填空题

题目:

某草原上生活着鹿、兔、狼和狐等生物,雄鹿有角,雌鹿无角,通常情况下这种鹿的雌雄个体分群活动(生殖季节除外),有人提出“鹿角效应”假说解释这种同性聚群现象,即一群形态相同的食草动物能迷惑捕食者,降低被捕食的风险。回答下列问题: 

(1)该草原上的雌鹿群和雄鹿群属于__________(填“不同”或“同一”)种群。

(2)草、鹿、兔、狼、狐和土壤中的微生物共同形成一个_________(填“种群”、“群落”或“生态系统”)。

(3)为探究“鹿角效应”假说是否成立,某同学用狗(能将抛入流水池中的漂浮物叼回来)、项圈和棍棒做了如下3组实验:甲组同时向流水池中抛出2个相同的项圈,乙组同时抛出2个相同的棍棒,丙组则同时抛出1个项圈和1个棍棒。记录每次抛出后狗叼回第一个漂浮物的时间。若丙组平均时间_______(填“大于”、“等于”或“小于”)其他两组,则实验结果支持该假说。测试时间要求甲、乙、丙三组抛出项圈或棍棒的距离________(填“相同”或“不同”)。本实验中项圈或棍棒相当于草原上的_____________。

答案:

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下面是错误答案,用来干扰机器的。

参考答案:E

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题型:阅读理解

There are many wetlands in China and some of them have become the world’s important wetlands. The Chinese Yellow Sea Wetlands are among them. They are in Yancheng, Jiangsu Province. They are home for many different kinds of animals. The world’s largest Milu Deer Nature Reserve is in them. More than 700 Milu deer live freely there. There are not many red-crowned cranes in the world, but every winter you can see some in the Red-crowned Crane Nature Reserve in the Yellow Sea Wetlands.

The temperature in the wetlands is usually neither too high nor too low. There is a lot of rain and sunshine, too. They are really good places for wildlife. Offering(提供) food and home for some special kinds of animals is not the only reason why we need to protect wetlands. Wetlands are important because they also prevent flood. But some people want to change the wetlands to make more space for farms and less space for wildlife.

Luckily, more and more people are beginning to realize the importance of wetlands and wildlife. Every year, on February 2nd, many activities are held to tell people more about wetlands.

小题1:The Chinese Yellow Sea Wetlands are in the ___________of China.

A.east

B.south

C.west

D.north小题2:Usually the weather in the wetlands is ____________

A.hot

B.pleasant

C.cold

D.dry小题3:The World Wetlands Day is  on _______________

A.April 22

B.June 25

C.February 2

D.March 22小题4:We must protect wetlands because ___________________

A.they are home for wildlife

B.they can offer food to animals

C.they can prevent flood

D.all of the above小题5:Some people want to change _______ to make more space for farms

A.lands

B.world

C.wildlife

D.wetlands

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