【单选题】The potential support ratio, or PSR (the number of persons aged 15-64 years per one older person aged 65 years or older), indicates the dependency burden on potential workers. The impact of demographi...
【单选题】Section A Directions: In this section, you will hear 8 short conversations and 2 long conversations. At the end of each conversation, one or more questions will be asked about what was said. Both the ...