单选题 The economic stability of nations and continents is often affected by the abundance or ______ of natural resources.
【正确答案】 D
【答案解析】[解析] 句意：一个国家经济的稳定常常受到自然资源的丰富与否的影响。dearth缺乏。force力量；魄力。condensation凝结，压缩。rainfall降雨量，降雨。