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There are many holidays and festivals. Dads have Father's Day. Children have Children's Day. Is there a special day for old people?

Double Ninth Festival is a special day for old people in China. It started long ago. The festival is on lunar September 9th. This year it is on October 13th. On this day, people show love for their grandparents.

People do many different kinds of things on this day. They enjoy flowers, eat special cakes and drink wine(酒).

      It's very interesting. The best way to celebrate it is climbing hills or mountains. People think climbing will bring them good luck and help old people live long lives. Double Ninth Festival is also a good time for a family get-together. And young people give their presents and best wishes to the old.

下列对于清朝闭关政策的表述，错误的一项是（  ）

热岛效应

城市的平均气温比周围乡村高一些，就像一个个“热岛”分布于乡村之中，这种现象称为“热岛效应”（如图）。形成“热岛效应”的原因大致有：在城市的生产和生活中，燃烧大量的燃料，排放出大量的热；以水泥、沥青为主的路面和建筑物有较强的吸收太阳辐射能的本领；城市中的水面小、地面的含水量小，致使水的蒸发少，加之空气流动不畅，城市中的热不能及时传递出去等。这种效应给城市和周围乡村的环境带来不利影响。

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“夫欲盛而费广，费广而赋重，赋重则民愁，民愁则国危，国危则君丧耶”。唐太宗为实现上述治国思想采取的措施是 （     ）