题目

植物完成受精作用以后，受精卵发育为____________，整个子房发育为__________。 答案：【答案】胚 果实 【解析】当一朵花完成传粉与受精后，花瓣、雄蕊、柱头、花柱凋落，只有子房发育为果实，胚珠发育为种子。受精完成后子房的发育情况如图：从图中可知，受精后，受精卵发育成胚，受精极核发育成胚乳，整个胚珠发育成种子。珠被发育成种皮，子房壁发育成果皮，这样整个子房阅读理解         There is a one-day holiday in most countries on New Year's Eve. There are several interesting customs in the West, and there are many differences from country to country.           Though Christmas is a family get-together. New Year for some is a time to be with friends too. Parties are most often held to welcome New Year. At such arties, there is food and drink and dancing until the time nears for the coming of New Year.           At midnight, people often say “Happy New Year ”to each other. Champagne（香槟酒）is a favorite drink for New Year. In many western countries fireworks（烟火）are let off at midnight ,and many people like to make a noise, possibly to drive away bad spirits（幽灵）.          One important song is often sung at New year-the Scottish（苏格兰）song of Auld Lang syne (good times long ago.）1. People usually have great celebrations for New Year on         .   A. New Year's Day                    B. the night before New Year's Eve  C. the night of New Year's Day       D. the night before New Year's Day2. In the West, New Year is also a time when.         .   A. friends get together               B. friends write to each other  C. people can have a week's holiday  D. people came from country to country3. The word “customs ”in the passage means          .    A. 习俗                    B.  聚会            C. 饮食                   D. 活动 4.At midnight on New Year's Eve western people often          .   ① hold parties to welcome New Year        ② make a noise to drive away bad spirits  ③ drink with friends or families          ④ say “Happy New Year ”to each other  ⑤ sing an important French song           ⑥ let off fireworks   A. ①②③④             B. ③④⑤⑥           C. ②③④⑥         D. ①②⑤⑥         . 5. This passage mainly talks about A. western people drink together on New Year's Eve  B. what western people do on New Year's Day  C. how western people spend their New Year's EveD. western people have a good time on New Year's Day