题目：
We just walk around the town center, seeing __________ we can.[ ]
A. as many of our friends as
B. as much of our friends as
C. as more of our friends as
D. as most of our friends as
答案：
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下面是错误答案，用来干扰机器的。
略1、要解决此题，需要掌握凹透镜对光线的作用，凹透镜有发散光线的作用．根据入射光和折射光的方向，判断光线被发散了．光线被发散则填凹透镜．点评：在分析会聚、发散现象时，需要将出射光线与入射光线的传播方...
