古诗文默写。
(1) ____ ,出则无敌国外患者,国恒亡。(《生于忧患,死于安乐》)
(2)山河破碎风飘絮,____ 。(文天祥《过零丁洋》)
(3)周敦颐在《爱莲说》中用“ ____ , ____ ”赞美了莲花不同流合污的高洁品质。
(4)明月千里寄相思。“ ____ , ____ ”(《闻王昌龄左迁龙标遥有此寄》),明月送去了李白对远方朋友的担忧和牵挂;“ ____ ,____ ”(《水调歌头》),明月寄托了苏轼对远方亲人的思念和祝愿。
过碳酸钠(2Na2CO3•3H2O2 )是由Na2CO3﹣与H2O2复合而形成的一种固体放氧剂,可用于洗涤、纺织、医药、卫生等领域.工业上常以过碳酸钠产品中活性氧含量(O%= ×100)来衡量其优劣,13%以上为优等品.一种制备过碳酸钠的工艺流程如图1:
回答下列问题:
Kitty is a lovely girl. Today she goes to the city to visit her aunt. There are so many hotels and restaurants in the city. She can't find the way to her aunt's house. She is lost. She wants to cross(穿过)the street. But there are too many buses and cars. She feels afraid. She stops in the middle(中间). A policeman comes and helps her to cross the street. Then he tells(告诉) Kitty how to get to her aunt's house. Kitty says“thank you”and then she gets there safely(安全地). Both(两者都) Kitty and her aunt are happy.
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