What they discovered was nothing less than a new source of energy.

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问题 What they discovered was nothing less than a new source of energy.

选项 A、他们所发现的并非不是新的能源。
B、他们所发现的正是新的能源。
C、他们所发现的不亚于新的能源。
D、比起新的能源,他们什么也没发现。

答案B

解析 注意what引导的主语从句,意为"所……的",短语nothing less than意为"完全/正好"。
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