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     Qi Haoran, a Junior Grade One student at a High School Attached to Harbin Institute of Technology, was quite busy over the past winter holiday – and not just with homework. Qi, together with 10 other classmates made a volunteer group to call on people to join the Clean Your Plate Campaign (光盘行动).

     These students went to many restaurants and told people the importance of saving food. “Excuse me, do you know that 950 million people around the world still haven't got enough to eat? Please don't waste food.” They would say this kind of thing hundreds of times every day.

     The Clean Your Plate Campaign began on the Internet in January. It calls on people to reduce food waste. China in recent years has experienced serious problems with wasted food. CCTV reported in January that the food Chinese people waste every year is enough to feed 200 million people for a year.

     Chinese people are well-known for being hospitable（好客的） and generous. Many even feel that they lose face if their guests have eaten all the food.

     Luckily, the campaign has got the support of many. In a restaurant in Xinjiang, the owner gives the guests who have eaten up all that they ordered a sticker（贴花）. People can enjoy a free meal when they have 10 stickers. More than 750 restaurants in Beijing have begun to offer smaller dishes and encourage their guests to take leftovers (剩饭剩菜) home.

     To reduce food waste is a big task, and it needs time. It's important that everyone does their bit, just like Qi. Did you finish your meals today? 

 据新华社报道，2014年8月20日上午，青奥会赛艇女子双人单桨比赛的最终“奖牌榜”出炉，四川选手罗雅丹与队友潘婕合作，以3分37秒52的成绩获得银牌．赛程全长2000米，图所示为她们在比赛中的情境．下列四个速度中，比她们的平均速度大的是（　　）

1931-1945年，中国人民进行了长达十四年的抗战，最终打败了日本帝国主义，赢得了抗战的胜利，结合所学知识，回答问题：

材料一：  一九二九年十月从美国开始的经济危机突然到来，迅速席卷全球，根本改变了原有的世界经济格局，造成全球性经济大混乱。这场经济危机给日本经济的打击是沉重的，为激进法西斯势力的崛起提供了充分的气候和土壤。

——摘编自郭廷以《近代中国史纲》

材料二：  一九三一年九月二十一日，蒋介石在日记中写道：“余主张日本占领东省事，先提国际联盟与非战公约国，以求公理之战胜。”南京发表的《告公民书》称：“政府现时既以此次案件诉之于国联行政会，以待公理之解决，故已严格命令全国军队对日军避免冲突，对国民亦一致告诫，务必维持严肃镇静之态度。”

——摘编自《蒋介石日记》

材料三：  七月七日晚，驻丰台的日军在卢沟桥附近进行夜间军事演习，借口一士兵失踪，攻击宛平城，駐守当地的第二十九军宋哲元部吉星文团奋起抵抗，战争全面爆发，蒋介石在七月八日采取了以下行动：电令宋哲元，“宛平城应固守勿退，并须全体动员，以备事态扩大；电令军委会办公厅主任徐永昌、参谋总长程潜，准备增援华北；下令孙连仲、庞炳勋率部北援。

——摘编自《卢沟桥事变史料》下册

材料四：  台儿庄战役的胜利，主要是第五战区将士在极端困难的条件下充满爱国热情地英勇作战的结果，还有一个原因是得到鲁南爱国民众的有力支持，他们一村一村组织起来，冒着敌人的炮火，日夜奔走在战场上抬运伤兵。

——摘编自金冲及《二十世纪中国史纲》

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