问题描述：
( )computers are of great benefit to the development of science and technology.Athe fact is what
Bthat the fact is Cwhat the fact is that Dthe fact is that ,为什么选D呢,用什么语法呢,
Bthat the fact is Cwhat the fact is that Dthe fact is that ,为什么选D呢,用什么语法呢,
问题解答：
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