The number of people aged 60 years and over has tripled since 1950 globally, reaching 600 million in 2000 and surpassing ______ million in 2006. It is projected that the combined senior and geriatric population will reach 2.1 billion by 2050.
A: 650
B: 700
C: 750
D: 800
A: 650
B: 700
C: 750
D: 800
举一反三
- The population of China has reached over 1.3_____. A: thousand B: million C: billion D: trillion
- About _____ people speak English as their first language. A: 700 million B: 1.5 billion C: 1 billion D: 360 million
- After the founding of the New China, China’s population has increased continuously, with a population of _____. A: 540 million in 1949 B: 540 million in 1949 C: 1.31 billion in 1990 D: 1.418 billion in 2019
- The number of people living in the UK is approximately_________________. A: 100 million B: 200 million C: 20 million D: 60 million
- The population of the world today is about______ . A: 400 million B: 4 billion C: 400 million D: 40 billion