[试题]

.Water and air are _______ to human beings. We can not live without them.

    A.harbour B.function C.definite D.essential

 

参考答案与解析：

相关试题

______no air or water, there would be no

[单选题]______no air or water, there would be no life in the world.A． There wasB． There wereC． Is thereD． Were there

  • 查看答案

    • In comparison with its own size.,a blade of grass looks ___ to an ant as a tree does to a human bein

    In comparison with its own size.,a blade of grass looks ___ to an ant as a tree

  • 查看答案

    • Air pollution is more serious than water pollution.

    [问答题]Air pollution is more serious than water pollution.

  • 查看答案

    • Air pollution is more serious than water pollution.

    [问答题]Air pollution is more serious than water pollution.

  • 查看答案

    • In a chilled water air conditioning unit using a reciprocating compressor, the refrigerating effect

    In a chilled water air conditioning unit using a reciprocating compressor, the r

  • 查看答案

    • A nature and human B parents and children C water and life D way and virtue

    A nature and human B parents and children C water and life D way and virtue(2.0分

  • 查看答案

    • Water and itsimportance to human life were the center of the world's attention last week.March

    [单选题]Water and itsimportance to human life were the center of the world's attent

  • 查看答案

    • Water and itsimportance to human life were the center of the world's attention last week.March

    [单选题]Water and itsimportance to human life were the center of the world's attent

  • 查看答案

    • Water and itsimportance to human life were the center of the world's attention last week.March

    [单选题]Water and itsimportance to human life were the center of the world's attent

  • 查看答案

    • Water and itsimportance to human life were the center of the world's attention last week.March

    [单选题]Water and itsimportance to human life were the center of the world's attent

  • 查看答案