阅读理解

　　It's eight o'clock in the morning. The students are coming into the classroom. A girl is opening the windows. Some students are laughing and talking. Some others are listening to them. Some are reading books. Some are doing their homework.

　　Miss Yang is our English teacher, and she is standing in front of the blackboard and writing on it. Daming and Tony are wearing their new clothes today. Betty and Jim are cleaning their desks. They are all happy. Where are Lucy and Lily? Oh, they are playing chess on the floor.

氯化钠溶液中混有少量的硫酸钠杂质，除杂质所用试剂为(    )

非洲西海岸和南美洲东海岸的轮廓和生物相似性证明了(    )

如图，菱形ABCD的边长是2cm，E是AB的中点，且DE丄AB，则菱形ABCD的面积为____ cm²．

填入下面文段空白处的词语，最恰当的一组是（    ）

    中国古代的文人墨客，无论富贵贫贱，通达潦倒，欢喜哀愁， ① 离不开酒。 ②   说魏晋南北朝的文人饮酒是隐逸中略带悲剧情调，那么唐朝文人饮酒更多的是放浪和旷达。 ③ 唐代文人之醉酒， ④ 有忘记现实痛苦的因素，更多的是壮志豪情的抒发和对未来的展望。“酒入豪肠，七分酿成了月光，剩下三分啸成了剑气，绣口一吐就半个盛唐。”盛唐之盛，不仅在于锦绣繁华，满目俊才， ⑤ 也少不了诗情勃兴，酒气恣横。 ⑥ 有人说整个盛唐的诗歌都是由酒香酿成的。