In 1991， for the second （year） in a row， the economies of lowincome and middle-income countries virtually stagnated.（） A: repeatedly B: successively C: respectively D: successfully

WHO estimates that 70% of the people with diabetes live in low and middle income countries.

P3-24: A consistent income gap.|A decreasing income gap.|An increasing income gap.|No income gap.

​我国中等收入阶层人数已达3亿，占全球中等收入群体的30%。‍ A: China's mid-income class has reached 300 million, accounting for 30% of the middle-income group globally. B: China's mid-income class has reached 3 billion, accounting for 30% of the middle-income group globally. C: China's mid-income class amounted to 30 million, accounting for 30% of the middle-income group globally. D: China's mid-income class amounted to 3000 million, accounting for 30% of the middle-income group globally.

我国中等收入阶层人数已达3亿，占全球中等收入群体的30%。 A: China's mid-income class has reached 300 million, accounting for 30% of the middle-income group globally. B: China's mid-income class has reached 3 billion, accounting for 30% of the middle-income group globally. C: China's mid-income class amounted to 30 million, accounting for 30% of the middle-income group globally. D: China's mid-income class amounted to 3000 million, accounting for 30% of the middle-income group globally.

a good (or service) whose consumption declines as income rises and increases as income decreases increase in income=decrease in consumption decrease in income=increase in consumption

These targets are a__________（可达到的；可得到的）for most low-income and middle-income countries.

Why is the Medieval period named as the “Middle Ages” in European history? A: It is in the middle of the Christian Tradition and Islamic Tradition. B: It is in the middle of the Classical period and Modern period. C: It is in the middle of the early middle ages and late middle ages. D: It is in the middle of the landmass called Eurasia.

UNESCO estimates that providing just one year of preprimary education for all children in low and middle income countries will cost an additional ___ per year? A: $5.2 billion B: $10.2 billion C: $15.2 billion D: $20.2 billion E: $31.2 billion

我国中等收入阶层人数已达3亿，占全球中等收入群体的30%。 A: China's mid-income class has reached 300 million, accounting for 30% of the middle-income group globally. B: China's mid-income class has reached 3 billion, accounting for 30% of the middle-income group globally. C: China's mid-income class amounted to 30 million, accounting for 30% of the middle-income group globally.