题目内容:
WhydoestheauthormentionIndiaandChinainparticular?
A.Theirself-sufficiencyisvitaltothestabilityofworldfoodmarkets. B.Theirfoodyieldshavebeguntodecreasesharplyinrecentyears.
C.Theirbigpopulationsarecausingworldwideconcerns.
D.Theirfoodself-sufficiencyhasbeentakenforgranted.
参考答案:
答案解析: