With declining fertility and rising life expectancy, the Vietnamese population is expected to age rapidly, making the development of a modern social security system a pressing priority for Vietnam. The current system faces a number of major challenges, including low coverage rates in both the form...
Cau 4. Trong tap hop so ty nhien , phép tru a - b chi thuc hien duoc khi B A. a b. B. a2 b. C. a b. D. a ≤ b. 相关知识点: 试题来源: 解析 BTrên tập, phép trừchỉ thực hiện được khi. ...