问答题 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?
【正确答案】
【答案解析】21:00[解析] 题意为：假如再过两小时，那么距离午夜的时间(24点)将是再过一小时后距离午夜时间的一半。那么假设现在的时间为X，可以列出式子24-(X+1)=2[24-(X-2)]，得出X为21。