A.harbour B.function C.definite D.essential
[单选题]______no air or water, there would be no life in the world.A. There wasB. There wereC. Is thereD. Were there
[问答题]Air pollution is more serious than water pollution.
[问答题]Air pollution is more serious than water pollution.
[单选题]Water and itsimportance to human life were the center of the world's attent
[单选题]Water and itsimportance to human life were the center of the world's attent
[单选题]Water and itsimportance to human life were the center of the world's attent
[单选题]Water and itsimportance to human life were the center of the world's attent
[单选题]Water and itsimportance to human life were the center of the world's attent
[单选题]Water and itsimportance to human life were the center of the world's attent
[单选题]Water and itsimportance to human life were the center of the world's attent