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【单选题】
中生代是恐龙繁盛时代,可是后来灭绝了，灭绝的原因一般是
[ ]
A.
食物缺乏
B.
不能适应环境
C.
遗传物质的变化
D.
冰川的作用
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参考答案：
举一反三
【单选题】与太湖石齐名,为中生代红、黄色砂、泥岩层岩石的一种统称, 它是一种呈茶黄色的细砂岩,以其黄色而得名 ,称之为 ( ).
A.
太湖石
B.
黄石
C.
青石
D.
鹅卵石
【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.
相关题目：
【单选题】与太湖石齐名,为中生代红、黄色砂、泥岩层岩石的一种统称, 它是一种呈茶黄色的细砂岩,以其黄色而得名 ,称之为 ( ).
A.
太湖石
B.
黄石
C.
青石
D.
鹅卵石
【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.
参考解析：
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