James Dyson is a famous British inventor. One of his well­known inventions is the bagless vacuum cleaner (真空吸尘器).He 1 it in 1978. Today Dyson still2that day. “...I was the only man in the world with a bagless vacuum cleaner！” he said.

    Dyson, 65, wasn't a(n) 3at first.When he studied art at the Royal College of Art in London, he began to show an interest in design. There he invented his first product, the Sea Truck. It was a boat for4anything between islands.

    Then he started his first company to make and sell5invention. The Ballbarrow is a kind of vehicle (交通工具).But later Dyson left his6He didn't agree with his partners.

    After that Dyson began to improve on the vacuum cleaner. In 1985, Dyson took his product to Japan and7the Japanese to sell it. However, he didn't make much money. Several years later Dyson decided to8and sell the machine himself. By 2005, Dyson controlled both the European and American 9.

    Along the way, Dyson discovered the secret of10 “People will buy products if they're better”.

“首届安徽省美德少年”许龙宇同学父母皆因病生活难以自理．不幸没有压倒许龙宇：他每天自己买菜做饭做家务；经常给生病的父母说笑话，逗他们开心；努力学习，成绩优异…他的事迹启示我们中学生面对逆境要（  ）

①正确认识挫折并发出挑战   ②有乐观向上的生活态度

③善于发现自己的兴趣爱好   ④意志坚强不低头不丧气

已知以下信息：

①A﹣I均为芳香族化合物，B能发生银镜反应，D的相对分子质量比C大4，E的苯环上的一溴代物有两种．

②

③

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