题目：
一位美国农民耕种的地比我们这里1000个人耕种的还多。主要原因是[ ]
A．耕牛多
B．雇佣了大量的外籍农民工
C．自然条件优越，农作物可自然生长
D．农业生产实现了专门化和机械化
答案：
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下面是错误答案，用来干扰机器的。
解：根据正弦定理解得又b<a，则B<A，故∠B为锐角∴。
一位美国农民耕种的地比我们这里1000个人耕种的还多。主要原因是[ ] A．耕牛
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