A:点燃酒精灯
B:蒸馏
C:过滤
D:稀释浓硫酸
阅读下列材料,回答问题。
材料一 八政:一曰食(农业生产),二曰货(商品流通),三曰祀,四曰司空,五曰司徒,六曰司寇,七曰宾,八曰师。
——《尚书·洪范》
材料二 以九职任万民:一曰三农,生九谷……五曰百工,饬化八材;六曰商贾,阜通货贿……
——《周礼·天官》
材料三 僇力本业,耕织致粟帛多者,复其身 (免徭役);事末利及怠而贫者,举以为收孥。
——《史记·商君列传》
材料四 世儒不察,以工商为末,妄议抑之。夫工固圣王之所欲来,商又使其愿出于途者,盖皆本也。
——清·黄宗羲《明夷待访录》
It is the____of____today. My family are going to visit____. Uncle Li____my father. He is____for us at the airport. Now we are in the taxi to my relative's house. My brother is a____boy, so he is sitting between my mother and father. We are____very happy.
Can you play yo-yo? ____
裸子植物与被子植物的相同之处是( )