If it were two hours later, it would be half as long until midnight as it would be if it were an hour later. What time is it now?
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【正确答案】 1、正确答案：21:00    
【答案解析】解析：设现在时间为x，根据题中的时间倍数关系，可列出2×[24一(x+2)]=24-(x+1)，解得x=21，所以时间是21点。