单项选择题

uv=(v-u)^u(u-v)^v（）

A. if Quantity A is greater;
B. if Quantity B is greater;
C. if the two quantities are equal;
D. if you cannot determine the relationship based on the given information.

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单项选择题

What is the average of four consecutive odd numbers starting with 2n+1（）

A. 4
B. 2n+3
C. 2n+4
D. 2n+5
E. n+4

uv=(v-u)u(u-v)v（）

uv=(v-u)^u(u-v)^v（）