著名的 (4) 实验向人们显示大气压强的存在并且是很大的;意大利科学家 (5) 首先通过实验测定了大气压强的数值。实验表明大气压强的大小随海拔高度的变化而变化,海拔高度越低,大气压强就越 (6) (选填“大”或“小”)。 答案:马德堡半球;托里拆利;大Do you know ________?A.what time does he have lunchB.what time he has lunchC.what time will he have lunchD.what time has he had lunch