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x>2z and y>2zQuantity A: x+yQuantity B: zA、Quantity A is greater.B、Quantity B
x>2z and y>2zQuantity A: x+yQuantity B: zA、Quantity A is greater.B、Quantity B
游客
2025-02-23
25
管理
问题
x>2z and y>2z
Quantity A: x+y
Quantity B: z
选项
A、Quantity A is greater.
B、Quantity B is greater.
C、The two quantities are equal.
D、The relationship cannot be determined from the information given.
答案
D
解析
认为x>2z,y>2z,那么x+y>4z,于是得到x+y>z,这是绝对不对的。因为z也有可能是负数,例如:x+y>-4,但是不能够说x+y>-1,所以本题应该是无法判断,选择D。
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