题目

按一定的逻辑顺序排列，正确的是 ①性状    ②染色体   ③基因     ④DNA      ⑤细胞核 A.①②③④⑤   B.⑤②③④①   C.⑤②④①③    D.⑤②④③① 答案：DThe children are always ______ to set off ______ the seaside.A.excited, to　　B.exciting, to　　C.excited, for　　D.exciting, for