题目

Do you know why you sleep? You may think it’s because you’re tired. Or perhaps you’ve been told sleep is good for you. Yet no one knows exactly why or how people sleep.Until the early 1950s, most scientists thought the body and brain rested during sleep. Then a scientist watched people sleep. He noticed that during periods of between 5 and 30 minutes each, sleepers’ eyes made rapid movements, as if they were watching something. He called these periods REM sleep, for Rapid Eye Movement. Periods when sleepers’ eyes did not move he called non-REM sleep.Whenever the scientist woke people已知某温度下在密闭容器中加入CH3OH，发生如下可逆反应：2CH3OH（g）==CH3OCH3（g）+H2O（g），反应到某时刻测得各组分的物质的量浓度（mol·L-1）如下，下列有关说法不正确的是（   ）A．10min时v正=v逆B．5min时该反应速率v(CH3OH)=0.088mol·L-1·min-1C．该温度下此反应的平衡常数k=400D．平衡后其它条件不变，升温，c(CH3OH)=0.06mol/L，该反应△H<0