2014上海中考英语首字母填空专项练习 （一） Sleep is not the same every night. We experience some deep sleep and some active sleep(积极睡眠), which is when dreams happen. You might think sleepwalking(梦游) would happen in active sleep, but a person isnt physically active d 86 active sleep. Sleepwalking usually happens in the first few hours of sleep in the stage called slow-wave(慢波)or deep sleep. Not all sleepwalkers a 87 walk. Some simply sit up or stand in bed or
