2x +5y = 24 l≤x≤3 Column A Column B x y A．if the quantity in Column A is greater B．if the quantity in Column B is greater C．if the two quantity are equal D．if the relationship cannot be determined from the information given
A.if B.if C.if D.if
【参考答案】
B 解析：本题的正确为(B)。因为2x+5y=24是一条直线方程，因此考生可以用边界条件法进行求解，所谓边界条件......