题目

主动运输不同于简单扩散的特点是（ ） ①不需要载体蛋白质  ②低浓度→高浓度    ③消耗能量 ④需要载体蛋白质    ⑤高浓度→低浓度    ⑥不消耗能量． A．②③⑤B．②③④C．①⑤⑥D．①④⑥ 答案：B阅读下面的短文，然后按照要求写一篇150词左右的英语短文。 China bans free plastic bags CHINA began a crackdown on plastic bags, banning production of thin bags and forbidding supermarkets and shops from handing them out free, Tuesday, June 1, 2008． Chinese people use up to 3 billion plastic bags a day and the country has to refine 5 million tons of oil every year to make plastics used for packaging, according to a report on the Website of China Trade News, and fails to get rid of them properly, wasting valuable oil and littering the country, the State Council said in a notice posted on the Central Government’s Website． “Our country consumes huge amounts of plastic bags every year．While providing convenience to consumers, they have also caused serious pollution, waste of energy and resources, because of too much use and inadequate recycling,” it said． Worries about pollution are growing among ordinary citizens, as years of breakneck growth has a very bad effect on the country’s air and water, but the new ban may not be universally welcomed．  [写作内容] 1．请用30个词概括短文的要点； 然后用约120个词就“‘为了环保和节能，禁止商场免费提供塑料袋’的禁令与方便老百姓日常生活的矛盾”这一中心发表看法，并包括如下要点： a） 你对国家这一禁令的看法，并说明你的理由； b） 禁令实施后，消费者该怎么办? ［写作要求］ 1．可以使用实例或分项论述的方法支持你的论点，也可以参照阅读材料的内容，但不得直接引用原文中的句子； 2．标题自定。