Water and air are( )to human beings. We can not live wit
时间:2019-06-10 23:08来源:未知 作者:admin 点击:
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(单选题)41: Water and air are( )to human beings. We can not live without them.
A: harbour
B: function
C: definite
D: essential
(单 选题)41: Water and air are( )to human beings. We can not live without them.
A: harbour
B: function
C: definite
D: essential
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