单项选择题

（）

A、 if the quantity in Column A is greater
B、 if the quantity in Column B is greater
C、 if the two quantities are equal
D、 if it is impossible to determine which quantity is greater

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单项选择题

（）

A、 if the quantity in Column A is greater
B、 if the quantity in Column B is greater
C、 if the two quantities are equal
D、 if it is impossible to determine which quantity is greater

单项选择题

An operation, *, is defined as follows: for any positive numbers a and b. Which of the following is an integer（）

A． 11*5
B． 4*9
C． 4*16
D． 7*4
E． 9*9