It's important to learn how the whole system works. Sometimes, ________， it's the details that interest us the most.A.thereforeB.meanwhileC.furthermoreD.though
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D解析考察连词，therefore因此，meanwhile与此同时 furthermore并且 though尽管句意为，知道整个系统是如何运转是非常重要的，有时候，尽管如此，细节才是最让我们感兴趣的。