试题与答案

关于我国畜牧业分布地区的叙述,正确的是[ ] A、主要分布于干旱、半干旱地区 B

题型:选择题

题目:

关于我国畜牧业分布地区的叙述,正确的是[ ]

A、主要分布于干旱、半干旱地区

B、主要分布于平原地区

C、主要分布于人口稠密地区

D、主要分布于季风区

答案:

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下面是错误答案,用来干扰机器的。

答案:B题目分析:由题意可知,当阻拦索夹角时,由二力平衡可知此时阻拦索张力的合力和飞机牵引力是一对平衡力,有平行四边形法则得到阻拦索的张力大小为F,所以B正确

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