题干

已知:①A是石油裂解气的主要成份,A的产量通常用来衡量一个国家的石油化工水平;现以A为主要原料合成乙酸乙酯,其合成路线如图所示.

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同类题1

阅读理解

    It was Mother's Day morning last year and I was doing my shopping at our local supermarket with my five-year-old son, Teayson. As we were leaving, we found that only minutes earlier an elderly woman had fallen over at the entrance and had hit her bead on the concrete. Her husband was with her, but there was blood everywhere and the woman was embarrassed and clearly in shock.

    Walking towards the scene, Tenyson became very upset about what had happened to the couple. Ile said to me. “Mums it's not much fun falling over in front of everyone.”

    At the front of the supermarket a charity group had set up a stand selling cooked sausages and flowers to raise funds. Tenyson suggested that we should boy the lady a flower. “It will make her feel better,” he said. I was amazed that he'd come up such a sweet idea. So we went over to the flower seller and asked her if we could buy a flower for the lady to cheer her up. “Just take it,” she replied. “I can't take your money for such a wonderful gesture.”

    By now paramedics(救援人员) had arrived, and were attending the injured woman. As we walked up to her, my son became intimidated by all the blood and medical equipment. He said he was just too scared to go up to her.

    Instead I gave the flower to the woman's husband and told him. “My son was very upset for your wife and wanted to give her this flower to make her feel better.”

    At that, the old man started crying and said, “Thank you so much, you have a wonderful son, Happy Mother's Day to you.”

The man then bent down and gave his wife the flower, telling her who it was from. Though badly hurt and shaken, the old lady looked up at Tenyson with love in her eyes and gave him a little smile.

同类题4

阅读下列材料,回答问题。

材料一   “大一统”理念影响下的中国对外关系,一切政治关系皆为内政,没有“国家间”外交,没有与中国平行的、多元的国家观念,“四海之内莫不为郡县,四夷八蛮威来贡职”。只有君临天下的一元等级世界秩序:中国居天地之中心,以控周边的万邦属国。华夷之辨理论指导下的中国对外关系,确立了华夏民族在文化上的自信心和优越感,进而形成了对外关系格局里中国居高临下、傲视万国的情势。怀柔远人指导下的对外关系,是一种对外国单方面施恩、关怀的体现。

文:朝贡、贸易、通过使节团传播先进文化、教授接纳留学人员;武:军事打击;实质是以文化感召为导向的军事基础型外交活动。体制:天下体系——君臣关系,强时为君,弱时为臣。中国处于儒家文化共同体的核心位置,既保有道德和法律上的至尊,又能以军力保护诸国,同时在外敌入侵时由邻国充当挡箭牌,为中国争取缓冲时间,实际上也是一种精密的国际安全体系。

——择编自何新华《古代中国的世界观与清政府的三项外交原则》等

材料二  19世纪初,随着西方资本主义国家相继东来,清朝原有的由礼部和理藩院处办理对外事务的机制,根本无法满足西方国家想要与中国进行经济、政治、外交等多方面关系的强烈要求,传统的只有理藩而无外交的体制被打破。1861年,总理衙门正式成立。总理衙门的管辖范围,不但包括办理对外交涉、通商等事,凡与洋务有关者,比如修建铁路,开矿办厂,购买机器、船炮、枪械,兴办新式学堂,派遣留学生,管理关税等,皆归其管理。总理衙门的设立,标志着清王朝的对外态度发生了重大变化;其次,总理衙门的设立,改变了中国过去只有理藩而无外交的局面,使中国有可能步入国际外交轨道;再次,总理衙门的设立,结束了中国几千年来没有专门外交机构的政治体制格局;最后,总理衙门还结合当时世界各国的通例和自己的国情,确定了中国的国旗、国歌,使中国不再以王朝而是以国家的面目出现在国际舞台。

——摘编自马彦丽《从晚清外交机构的演变看中国外交近代化》