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【单选题】The biosphere is the name biologists give to the sort of skin on the suce of this planet that is inhabitable by living organisms. Most land creatures occupy only the intece between the atmospher...
A.
are only found below the normal altitude ofjet planes
B.
have been found well at the normal altitude of jet planes
C.
are not found below the suce of the earth
D.
are mainly found below the suce of the earth
【单选题】脊椎动物的进化历程是
A.
鱼类→两栖类→爬行类→鸟类→哺乳类
B.
鱼类→两栖类→爬行类→鸟类和哺乳类
C.
鱼类→爬行类→两栖类→鸟类→哺乳类
D.
鱼类→两栖类和爬行类→鸟类→哺乳类
【单选题】下列哪组动物代表了脊椎动物循环系统从简单向复杂的演化（）
A.
鲤鱼→青蛙→乌龟→青燕子
B.
蟾蜍→鳜→蛇→鳄
C.
海龟→大鲵→狗→鲨鱼
D.
大雁→家兔→蛇→蝾螈
相关题目：
【单选题】The biosphere is the name biologists give to the sort of skin on the suce of this planet that is inhabitable by living organisms. Most land creatures occupy only the intece between the atmospher...
A.
are only found below the normal altitude ofjet planes
B.
have been found well at the normal altitude of jet planes
C.
are not found below the suce of the earth
D.
are mainly found below the suce of the earth
【单选题】脊椎动物的进化历程是
A.
鱼类→两栖类→爬行类→鸟类→哺乳类
B.
鱼类→两栖类→爬行类→鸟类和哺乳类
C.
鱼类→爬行类→两栖类→鸟类→哺乳类
D.
鱼类→两栖类和爬行类→鸟类→哺乳类
【单选题】下列哪组动物代表了脊椎动物循环系统从简单向复杂的演化（）
A.
鲤鱼→青蛙→乌龟→青燕子
B.
蟾蜍→鳜→蛇→鳄
C.
海龟→大鲵→狗→鲨鱼
D.
大雁→家兔→蛇→蝾螈
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