题目:
To be eligible for retirement benefits at the Omega Corporation, the sum of an employee's age, in years, and the number of years of employment must be at least 70. If
x , where

, is a certain employee's age when hired and
y is the minimum number of years of employment required for the employee to be eligible for retirement benefits, which of the following equations represents the relationship between
x and
y ?
选项:
A、xy = 70
B、x + y = 70
C、2x + y = 70
D、x + 2y = 70
E、2x + 2y = 70
答案:
D