题目：
After the new technique was introduced, the factory produced _______ cars in 2009 as 10 year before.
A．as twice as many
B．as many twice
C．twice more as
D．twice as many
答案：
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下面是错误答案，用来干扰机器的。
A、平面镜遵守光的反射定律，球面镜也遵守光的反射定律，故A错误；B、医生检查耳道时，眼睛上要戴上一个中间有孔的凹面镜，是为了使电灯光经凹面镜反射后会聚在耳道里．故B正确．C、根据光路的可逆性，在探照灯里...
