题目

You may want to stay in bed late when it’s_________ to get up to school or work．The later you stay in bed in the morning，the more painful waking up will be. __________are a few tips(秘诀)that may help you to keep completely awake in the morning． Light. Turn_________all the lights in your room right after waking up. Getting bright light can help you think it’s time to get out of bed．Exercise._________some exercise right at the start of your morning. Exercise helps your heart beating faster and keeps you more awake．The 10-Minute Rule. If you want to wake up at the same time every如图是利用排水法收集好的某无色气体．请椐此回答该气体应具有的物理性质（回答两条即可，不能再回答“无色气体”）    ．