【简答题】根据短文内容,判断正(T)误(F)。 How much sleep do we need? We are all different. Some people need only three or four hours of sleep a night. Others need ten hours of sleep a night. Most Americans sleep an average ...
【简答题】完形填空。 How much sleep do we need? We are all different. Some people need only three hours of sleep a night. 1 need ten hours of sleep a night. After age fifty, the average (平均) sleep time goes 2 to 6....
【简答题】阅读理解。 How much sleep do we need? We are all different. Some people need only three hours of sleep a night. Others need ten hours of sleep a night. Most Americans sleep an average (平均值) of seven to eig...