New oceanic crust is formed along one or more margins of each plate by material issuing from deeper layers of the Earth's crust, for example, by volcanic eruptions of lava at midocean ridges.

　　The word "margins" is closest in meaning to which of following?

　　(A) edges

　　(B) peaks

　　(C) interiors

　　(D) distances

　　正确答案： A

　　托福词汇：margin 英['mɑ:d??n]美[?mɑrd??n]

　　n.边缘，范围;极限;利润，盈余;(版心外)的空白

　　vt.留边;成为…的边;加边于，围绕;为…加旁注

　　名词复数:margins

　　[例句]Second , margin loans are callable.其次，保证金贷款随时可以收回。