题目

下列关于空气的说法中，错误的是 A．工业上利用氧气和氮气的沸点不同，从液态空气中分离出氧气的过程属于物理变化     B．空气是一种十分重要的天然资源     C．若大量有害物质进入空气中，仅靠大自然的自净能力，大气还能保持洁净     D．按体积分数计，空气中约含有氮气78％、氧气21％、其他气体和杂质1％Tom and Dick are next door neighbor who work　　　　 　　  　　　　　　　　 1.________ in the same office so they walked together to and from　　　　    　　  　　　　　　 2.________ office. Some day as they were walking home together, it　　　　   　　  　　　　 3.________ sudden started to rain. Tom quickly opened his umbrella　　　　　　　　　　    4.________ and said, “My wife surely has foresight(预见). She said　　　　　　　　　　    5.________ on this morning it would rain and told me to carry my　　　　　　　　　　　　  6.________ umbrella with me.” Dick smiled and walked to him, said,　　　　   　　　　　　7.________ “My wife has even great foresight. She told me not to　　　　　　　　　　　　 8.________ carry an umbrella and as she knew you would certainly　　　　　　　　　　　　 9.________ have with you.”　　　　　　　　　　　　　　　　　　　　　　　　　　 10.________