单项选择题

（）

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

If a is increased by 25% and b is decreased by 25%, the resulting numbers will be equal. What is the ratio of a to b（）

A.A
B.B
C.C
D.D
E.E

多项选择题

Which of the following is an equation of a line that is perpendicular to the line whose equation is 2x+3y=4 Indicate all such equations.（）

A. 3x+2y=4
B. 3x-2y=4
C. 2x-3y=4
D. 4-3x=-2y
E. 4+2x=3y