题目

This is an incomplete sentence and four choices marked A.，B.，C.and D..Choose the best one of them to complete the sentence.The melting point of ice and the boiling point of water are the fixed points ______ the Centigrade scale is based.（　　）A. by whichB. at whichC. on whichD. for which

This is an incomplete sentence and four choices marked A.，B.，C.and D..Choose the best one of them to complete the sentence.
The melting point of ice and the boiling point of water are the fixed points ______ the Centigrade scale is based.（　　）
  • A. by which
  • B. at which
  • C. on which
  • D. for which

题目解答

答案

考查定语从句。先行词是the fixed points,______ the Centigrade scale is based是定语从句，做状语，be based on为固定短语，意为"以...为基础"，故用on which引导。
故选：C。

解析

本题考查定语从句。先行词是the fixed points，______ the Centigrade scale is based是定语从句，做状语，be based on为固定短语，意为"以...为基础"，故用on which引导。