中华文化博大精深，在世界文化之林中独树一帜，独领风骚。下列内容能够体现这一观点的有（   ）
① 浩如烟海的文化典籍       ② 名扬世界的科技工艺
③ 异彩纷呈的文学艺术       ④ 充满智慧的中国哲学  

    Mrs. Jones was over eighty, but she still drove her old car like a woman half her age. She loved driving very fast, and was proud of the fact 1 she had never, in her thirty-five years of driving, been punished 2 a driving offence (犯规，犯法).

    Then one day she nearly3 her record. A police car 4 her, and the policemen in it saw her5 a red light without stopping. Of course, she was stopped. It seemed 6 that she would be punished.

    7 Mrs. Jones came up to the judge, he looked at her seriously and said that she was  8 old to drive a car, and that the 9 why she had not stopped at the red 10was most probably that her eyes had become weak 11 old age, so that she had simply not seen it.

    When the judge had finished what he was 12, Mrs. Jones opened the big handbag she was 13 and took out her sewing. Without saying a word, she 14 a needle with a very small eye, and threaded it at her first attempt.

    When she had 15 done this, she took the thread out of the needle again and handed 16 the needle and the thread to the judge, saying, “Now it is your 17I suppose you drive a car, and that you are quite sure about your own eyesight.”

    The judge took the 18 and tried to thread it. After half a dozen tries, he had still not succeeded. The case (案例) against Mrs. Jones was19, and her record20 unbroken.

金属钛及钛的合金被认为是21世纪重要的金属材料，地壳中的钛矿石主要是金红石（TiO₂），TiO₂中钛的化合价是____ ．目前工业上制取钛的方法是：第一步，在高温时，将金红石、炭粉混合并通入氯气（Cl₂）制得TiCl₄和一种可燃性气体，该反应的化学方程式是____ ；第二步，在氩气的环境中，用过量的金属镁在加热条件下与TiCl₄反应制得金属钛（氩气不参加反应），该反应的化学方程式是：____ ．工程技术人员常用铝和氧化铁在高温条件反应生成氧化铝和铁来焊接铁轨间的缝隙，化学方程式是　____ ．

饲养观赏鱼，可以陶冶人的情操，增进人们对生活的热爱．空运观赏鱼，必须密封．为了解决鱼的吸氧问题，可在水中加入过氧化钙（化学式CaO₂），过氧化钙与水反应生成的是氢氧化钙和氧气．写出过氧化钙与水反应的化学方程式　____ ．