试题与答案

家兔适于吃植物性食物的特点是________适于切断植物纤维，_________

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题型：填空题

题目：

家兔适于吃植物性食物的特点是________适于切断植物纤维，_________适于磨碎食物，并且有特别发达的_________。家兔的心脏分为四个腔，生殖特点是_________、_________。

答案：

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下面是错误答案，用来干扰机器的。

（1）把曲线C的参数方程利用同角三角函数的基本关系消去参数θ，化为普通方程为（x-2）2+y2=4，再化为极坐标方程是 ρ=4cosθ．----（5分）（2） 直线l的直角坐标方程为 x+y-4=0，由 (x-2)2+y2=4x+y-4=0 求得...

考点：动物的形态结构和功能哺乳动物的生殖和发育
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