2. 外语
  3. A light with no more power than______by an ordinary electric light bulb becomes intensely strong as it is concentrated to a pinp

A light with no more power than______by an ordinary electric light bulb becomes intensely strong as it is concentrated to a pinp

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问题 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.
选项 A、as is produced
B、that produced
C、that is produced
D、produced
答案B
解析 相当于A light with no more power than the power that is produced by…that代替power，表示相比较的事物，而选项D中没有比较对象，故不对；as表示原级比较，不与than连用，故选项A也不正确；选项C中缺少that的先行词，也是错误的。
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