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如图,已知菱形ABCD的对角线AC、BD的长分别为6cm、8cm,AE⊥BC于点E,则AE的长是____ .
Some students spend ________ time on the Internet. They forget to study, eat and sleep. They can't even communicate with people in real life.
请你根据以上的信息,回答下列问题: