被子植物的受精过程依次是（　　）

①精子与卵细胞、中央细胞结合；②花粉管进入子房；③花粉管进入胚珠；

④花粉管顶端破裂，释放出两个精子；⑤花粉粒萌发出花粉管．

拿破仑说：“它是一只船，把法国革命的行政和社会的原则输送出去，„„在有些国家 里被接受为母法，并通过其子法现今正在那里发生效力。”拿破仑所说的“船”的是（    ）

用方框中所给的单词的适当形式填空，使短文正确、通顺。每词限用一次                                         

      Thailand's most celebrated festival is the Songkran Festival. It starts on April 13^th and____ for three days. Songkran is a Thai word which means "move" or change places" as it is the day whenthe sun changes its position. It is also____ as the "Water
Festival" because people believe that water will wash away the bad luck.
    The Thai people____ this festival with water . Everyone gets wet and since it is the____ season of the year, the custom is quite enjoyable. Songkran is a Public Spring Cleaning Day , supported by the local____ . Anything old or useless must be thrown away or it will____ the bad luck to the owner.
    During the festival, young people put scented (有香味的)water into the____ of elders and parents as a kind of respect. The elders in return____ the young people good luck. People also pour water over each____ 
    Thailand is almost completely an agricultural society and this has also been a perfect time to take a____ from hard work.