题目
A.to alert the reader to the dwindling water supply
B.to explain industrial uses of water
C.to acquaint the reader with water pollution problem
D.to demonstrate various measures to solve the pollution problem
第2题
A.distincitive
B.special - purpose
C.separate
D.general - purpose
第4题
Tenor is concerned with the purpose and subject-matter of communications.()
第8题
A.the other
B.another
C.others
第9题
' Make your contribution as informative as required (for the current purpose of the exchange).' belongs to the maxim of quality.()
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