（1）用化学符号填写下表空格：

 （2）化学就在我们身边，它与我们的生活息息相关。请从A熟石灰、B纯碱、C烧碱、D氮气、E浓硫酸、F盐酸这六种物质中，选择适当的物质用序号填空。
①能用于改良酸性土壤的物质是____；②常用于工业除锈的试剂是____；③我国著名化学家侯德榜发明的联合制碱法中的“碱”是指____。

要求：语言表达合理、得体，80字以内。

超级无限豆：我是觉得参加一些商业活动无伤大雅，可以提高博物馆的人气，本来现在去博物馆的人就很少。

我是一条鱼：在博物馆举办和保护文物不相关的商业活动，是把传统的文化文物当作了一种商业赚钱的手段，此举不妥。

完形填空。

    Once upon a time, a rich man and a poor man talked about what happiness was.

    The poor man said, “Happiness is 1we have now.”Seeing the poor man's old clothes and house, the rich man laughed at him and said 2“How can this be called happiness? My happiness is my huge and beautiful house with one 3rooms and a thousand servants(佣人).”

 4a windy night, a big fire happened in the rich man's house and his hundred-room house was burnt down into 5. All his servants went away and left him alone. The rich man lost 6 and he became a beggar(乞丐) overnight.

    One day, the beggar was very hungry. He came to 7 some food to eat when he passed by the poor man's house. The poor man 8him a bowl of rice, asking, “What do you think of happiness now?”

    The beggar said anxiously, “Happiness is 9 bowl of rice in your hand.”

    Happiness is all that at the moment. One 10enjoy happiness in all his lifetime only by cherishing(珍惜) what he has now.

按要求，完成下面的1-2题。

石缝间的蒲公英，远不似田野上的同zōng生长的那样茁壮。它们因山风的凶狂而不能长成高高的躯干，它们因山石的    而不能拥有众多的叶片，它们的茎显得坚韧而苍老，它们的叶因枯萎而失去光泽；只有它们的根竟似那柔韧而又强固的筋条，似那柔中有刚的藤蔓，深埋在石缝间狭隘的间隙里。生命就是这样被环境规定着，    被环境改变着，适者生存的规律    无情，    一切的适者都是战胜环境的强者，生命现象告诉你，生命就是拼bó。