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【单选题】The Day a Language Died50（） A.As these language become more powerful. their use as tools of business and culture increase. B.For the rest of us, when a language dies, we lose the possibility of a uniq...
A.
The Day a Language Died
B.
When Carios Westez died at the age of 76． a language died， too． Westez， more commonly known as Red Thunder Cloud， was the last speaker of the Native American language． Catawba． Anyone who wants to hear the songs of the Catawba can contact the Smithsonian Institution in Washington， D．C．， where， back in the 1940s， Red Thunder Cloud recorded a series of songs for future generations． __________（46）They are all that is left of the Catawba language． The language that people used to speak is gone forever． We are all aware of the damage that modern industry can do to the world’s ecology（生态）．However， few people are aware of the impact widely spoken languages have on other languages and ways of life． English has spread all over the world． Chinese， Spanish， Russian， and Hindi have become powerful languages． As well， ___________（47）．When this happens， hundreds of languages that are spoken by only a few die out． Scholars believe there are about 6，000 languages around the world， but more than half of them could die out within the next 100 years． There are many examples， Araki is a native language of the island of Vanuatu， located in the Pacific Ocean． It is spoken by only a few older s，so like Catawba，Araki will soon disappear． Many languages of Ethiopia will have the same fate because each one has only a few speakers． _________（48）In the Americas， 100 languages， each of which has fewer than 300 speakers， also are dying out． Red Thunder Cloud was one of the first to recognize the threat of language death and to try to do something about it． He was not actually born into the Catawba tribe， and the language was not his mother tongue． _________（49）． The songs he sang for the Smithsonian Institution helped to make Native American music popular． Now he is gone， and the language is dead． What does it mean when a language disappears When a plant or insect or animal species dies， it is easy to understand what we’ve been lost and to appreciate what this means for the balance of the natural word． However， language is only a product of the mind． To be the last remaining speaker of a language，like Red Thunder Cloud，must be a lonely destiny， almost as strange and terrible as being the last surviving member of a dying species． ____________（50）
【单选题】Many people feel that human beings are responsible for the disappearance of some other animal species. While we may have hastened the disappearance of some, abundant evidence suggests mankind has had ...
A.
Human beings have hastened the disappearance of some.
B.
There was mass extinction long before humanity's time on Earth.
C.
Human beings'activities have had great impact on the earth.
D.
Many species have extinct since the human race came into being.
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【单选题】The Day a Language Died50（） A.As these language become more powerful. their use as tools of business and culture increase. B.For the rest of us, when a language dies, we lose the possibility of a uniq...
A.
The Day a Language Died
B.
When Carios Westez died at the age of 76． a language died， too． Westez， more commonly known as Red Thunder Cloud， was the last speaker of the Native American language． Catawba． Anyone who wants to hear the songs of the Catawba can contact the Smithsonian Institution in Washington， D．C．， where， back in the 1940s， Red Thunder Cloud recorded a series of songs for future generations． __________（46）They are all that is left of the Catawba language． The language that people used to speak is gone forever． We are all aware of the damage that modern industry can do to the world’s ecology（生态）．However， few people are aware of the impact widely spoken languages have on other languages and ways of life． English has spread all over the world． Chinese， Spanish， Russian， and Hindi have become powerful languages． As well， ___________（47）．When this happens， hundreds of languages that are spoken by only a few die out． Scholars believe there are about 6，000 languages around the world， but more than half of them could die out within the next 100 years． There are many examples， Araki is a native language of the island of Vanuatu， located in the Pacific Ocean． It is spoken by only a few older s，so like Catawba，Araki will soon disappear． Many languages of Ethiopia will have the same fate because each one has only a few speakers． _________（48）In the Americas， 100 languages， each of which has fewer than 300 speakers， also are dying out． Red Thunder Cloud was one of the first to recognize the threat of language death and to try to do something about it． He was not actually born into the Catawba tribe， and the language was not his mother tongue． _________（49）． The songs he sang for the Smithsonian Institution helped to make Native American music popular． Now he is gone， and the language is dead． What does it mean when a language disappears When a plant or insect or animal species dies， it is easy to understand what we’ve been lost and to appreciate what this means for the balance of the natural word． However， language is only a product of the mind． To be the last remaining speaker of a language，like Red Thunder Cloud，must be a lonely destiny， almost as strange and terrible as being the last surviving member of a dying species． ____________（50）
【单选题】下列蕨类植物中，已经灭绝的是?
A.
裸蕨纲
B.
石松纲
C.
节蕨纲
D.
真蕨纲
【单选题】白垩纪属于( )
A.
古生代早期
B.
古生代晚期
C.
中生代
D.
新生代
【单选题】旅鸽灭绝的原因是( )。
A.
欧洲食用旅鸽
B.
人类大量捕杀旅鸽
C.
旅鸽失去栖息地
D.
利用媒鸽引诱其他旅鸽
【判断题】恐龙在白垩纪末期全部灭绝。()
A.
正确
B.
错误
【单选题】天花的灭绝是科学的力量吗：
A.
不是
B.
是
【单选题】下白垩纪K1距今大约( )
A.
70百万年
B.
230百万年
C.
130百万年
D.
135百万年
【单选题】Many people feel that human beings are responsible for the disappearance of some other animal species. While we may have hastened the disappearance of some, abundant evidence suggests mankind has had ...
A.
Human beings have hastened the disappearance of some.
B.
There was mass extinction long before humanity's time on Earth.
C.
Human beings'activities have had great impact on the earth.
D.
Many species have extinct since the human race came into being.
【判断题】软舌螺类目前还未灭绝。( )
A.
正确
B.
错误
【多选题】白垩纪末大灭绝可能的原因（ ）。
A.
火山喷发
B.
外星撞击
C.
海水变清澈
D.
气候变化
【单选题】扇鳍鱼类是在什么时候灭绝的？（）
A.
三叠纪
B.
寒武纪
C.
石炭纪
D.
二叠纪末
【单选题】在白垩纪末全部灭绝生物是（）。
A.
恐龙
B.
珊瑚
C.
裸蕨
D.
鱼类
【判断题】恐龙在白垩纪末期全部灭绝。()
A.
正确
B.
错误