题目

Below is a selection from a science report. Even facts “forgotten” by people during a busy day may be got back again if this is followed by a good night's sleep. Researchers from the University of Chicago asked volunteers to remember simple words. Many found their memories letting them down towards the end of the day, but the following morning, those who had slept well could remember much more. Researchers, writing in the journal Nature, said the brain could “rescue” lost memories during the night. When the brain is first asked to remember something, that memory is laid down in an 在100张奖卷中，有4张有奖，某人从中任抽1张，则他中奖的概率是(　　) A．　　　　 B．　　　　C．　　　　 D．