【参考答案】

　　(11-15) CACBD (16-20) ACDAC (21-25) BBBCA

　　Section B

　　(26-30) BDCAD (31-35) BCADC

　　Section C

　　(36) damage (37) underdeveloped (38) intelligence (39) nourished

　　(40) cause (41) breast (42) disease (43) lack

　　(44) can cost developing nations up to three percent of their yearly earnings

　　(45) poor countries could possibly double their economic growth if they improved nutrition

　　(46) Instead of directly providing food, the study suggests educational programs in health and nutrition for mothers with young babies