2014年7月13日至10月3日，第二届中国汉字听写大会在中央电视台成功举办。该节目受到了全国各界人士的喜爱与鼓励,其收视率和影响超越了电视剧和综艺选秀，成为年度最热的文化现象之一。对此认识正确的有（   ）

①汉字文化博大精深，源远流长  ②汉字文化是中华民族优秀的传统文化  ③我国公民有强烈的文化认同感  ④汉字是世界上最优秀、最古老的文字

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   Thank you for joining CCTV’s around the World show. Today we are in Egypt(埃及). It’s beautiful sunny day! There are many people here on  .Some are taking photos. Others are riding camels （ 骆驼 ）.The Egyptians (埃及人)are wearing a kind of scarf on their heads. They look cool! They wear them because it is so hot . This is a very interesting place . I'm looking at the five thousand years of history .

淀粉→麦芽糖→葡萄糖→糖元．