Presence of textbook content that corresponds to key messages of Facts for Life.
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数据链接：
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资源简介：
a: 1: Laos, 2: Cambodia, 3: Bangladesh, 4: Nepal, 5: Sri Lanka, 6: Zambia, 7: Niger, 8: Benin, 9: Ghana. b: Insufficient description.
创建时间：
2012-05-04
