写出下列各单项式的系数和次数：

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关爱地球上的生命就是保护人类赖以生存的生态环境，就是在保护人类自己。在这方面，我们青少年力所能及的贡献是（    ）

①严厉制裁猎杀野生动物的犯罪分子  ②拒绝捕食珍贵的野生动物；

③拒绝使用珍贵木材制品                      ④善待大自然，保护动植物

Street Markets Around the World

    There are many ways of shopping. You can shop by telephone, by post or through your home computer, but for many people, the most exciting way to shop is also the most traditional—at a street market. You can find markets anywhere in the world. Here are four of them:

    There are many "floating markets" in Asia; perhaps the most unusual(非同寻常) is in Thailand(泰国), at a place called Damned Saduak. It's open from six in the morning to the noon every day. People sell fresh fruit from their boats.

    Many Belgians(比利时人) say that the Grand Place is the most beautiful square in the world. It's the home of a colorful flower market. It's open every day except(除了) Monday. On Monday, instead of(替代) flowers, there's a wonderful bird market.

    One of the world's famous markets is in Mexico City(墨西哥城)—the Sonora Market. You can buy toys, birds, herbs(草本) and medicine. There're all kinds of things. It's open every day from early in the morning till late at night.

    In England, on Saturday and Sunday thousands of young people from all over London travel to the Camden Market—it's the place to go for street fashion, CDs and tapes. Many people also go there for fun.