题目

      Air pollution, such as haze, has become a serious problem around the world. Besides wearing a mask, what else can we do to protect ourselves from the dirty air?     Scientists have developed a new inhaler (吸入剂) that can reduce the effect air pollution has on people. It could help millions of people who are suffering from air pollution, the Guardian reports.     This inhaler is developed by German company Bitop and contains a molecule (分子) named Ectoine. The molecule creates a layer (涂层) that protects lungs from polluted air. It’s reported that the inhal我国面积最小的省级行政单位是A.海南省B.重庆C.香港D.澳门