than后面接句子的省略用法

一道选择题：

A light with no more power than______by an ordinary electric light bulb becomes intensely strong as it is concentrated to a pinpoint-sized beam.

A. that produced B. that is produced C.produced

这题选什么？请老师给出解题思路，谢谢！

希望老师再给出一些类似的题型的练习，这种题我老是错。

要做对这种题，关键还是培养“对称”感：

A light with no more power than the power that is produced by an ordinary electric light bulb becomes X 一道光束---带的能量比一只普通灯泡发出的能量----

= A light with no more power than the power that is produced by an ordinary electric light bulb becomes X (主语+系动词常可一起省略，改用成了V-ed)

= A light with no more power than the power produced by an ordinary electric light bulb becomes X

= A light with no more power than that produced by an ordinary electric light bulb becomes X

1. --A

2. no more power than 与...同样多的能量

mengxin Z -

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