题目

Icelanders have a beautiful tradition of giving books to each other on Christmas Eve and then spending the night reading. This custom is so deeply rooted in the culture that it is the reason for Christmas Book Flood, when the majority of books in Iceland are sold between September and December in preparation for Christmas giving. “Books get attention here.” Says Baldur Bjarnason, a researcher who has written about the Icelandic book industry. The small Nordic island, with a population of only 329,000 people, is extraordinarily literary (文学的). They love to read and write. Accord组成植物种子的主要结构是（　　）①种皮     ②胚芽     ③胚轴     ④胚根     ⑤子叶     ⑥胚乳．A．①②③④B．③④⑤⑥C．②③④⑤D．①②⑤⑥