在卫星云图上，白色表示（   ）

弹指挥间、沧桑巨变，65年前，中华人民共和国宣告成立，开启了中国历史的新纪元。在***的领导下，亿万人民艰苦创业，努力探索中国特色社会主义发展道路，在改革开放和现代化建设的历程中，创造了一个又一个奇迹，实现着强国富民、民族复兴的百年梦想。当今之中国，到处充满勃勃生机，各项事业蒸蒸日上，中国特色社会主义事业显示出强大的生命力。改革开放，从根本上，使中国一步步走向繁荣昌盛，华夏儿女们安居乐业。
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化简2a－3(a-b)的结果是（     ）

A

    Hi, I am Joe. I'm 13 years old. I'm a student in middle school. I'm from Sao Paulo, Brazil, but now I live in Los Angeles, USA.

    I have two brothers and a sister. My brothers are Carlos and Mattias and my sister is Giovanna. My parents are Luisa and J0han. We live in a big house (房子) and we have a dog. My favorite room in the house is my bedroom. There is a big bookcase, a blue bed and a small sofa in my room. Carlos and Mattias are in a room. They have yellow beds, but they don't have a bookcase. My sister's room is nice and tidy. But in my room there are books everywhere.

    In my free time, I like reading and playing sports. My favorite books are about music and sports. I always play soccer or basketball with my friends after school. On Saturdays, I have a music class. On Sundays, I like to pl0y basketball with my father and my brothers.

    I like traveling (旅行)very much I go on trips with my family every holiday (假期)we go to many cities, like London, Tokyo, New York and Paris. We will go to Beijing next time.

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