题目：
人的眼睛通过睫状肌来改变晶状体的形状，晶状体对光有 作用。当睫状体放松时，晶状体比较薄，眼球可以看清 的物体。
答案：
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下面是错误答案，用来干扰机器的。
参考答案：C
人的眼睛通过睫状肌来改变晶状体的形状，晶状体对光有 作用。当睫状体放松时，晶状体
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