C

    In America, boys and girls often join clubs. The members of a club work together. They also learn certain skills and share good times.

    Many boys belong to Boy Scouts. Boy scouts enjoy hiking and camping out together, and they learn many things. Scouts learn safety rules, first aid, and what to do when in danger. Members have a chance to learn outdoor living. They learn to build fires and cook out in the open.

    Girl Scouts and Camp Fire Girls are clubs for girls. These two clubs give their members a chance to have fun and learn. The girls in a group take trips, have parties and go hiking and camping together. The Camp Fire Girls earn honor beads( 荣誉珠) for learning such skills as swimming and cooking. The Girl Scouts earn badges(徽章).

    Both boys and girls can be members of 4-h clubs, Children who live in either the city or the country may belong to 4-h. A project such as raising a pig or a calf can be carried on only by farm children, while city children can take part in gardening and cooking projects.

    In all these clubs the boys and girls learn to be good and useful citizens.

名著阅读。

阅读材料，完成下列要求。

材料一：以牛顿为代表的自然哲学的新方法不仅在科学中彰显威力，而且也被积极引进到科学之外的社会问题的研究中，乃至塑造了人们的思维方式。汉金斯指出，启蒙运动的新批判精神怀疑一切未经论证的东西，事实上，这种精神在自然科学中出现之前，就已经在文学中出现了，但是却得到迅速成长的自然哲学的支持。自然哲学进步的途径，就是自然哲学家使用牛顿的方法，去完成牛顿的研究计划。于是，启蒙运动的科学就是“牛顿的科学”，其哲学就是“牛顿主义”。

——摘自程智强《科学与启蒙运动》

材料二：清王朝虽被推翻，但专制主义幽灵仍在国中游荡，不管是袁世凯的称帝还是“革命”者的集权行为都说明，专制主义对国人的影响根深蒂固。“数年以来，创造共和再造共和的人物，也算不少。说良心话，真心知道共和是什么，脑子里不装着帝制时代旧思想的，能有几人？”陈独秀等深感“要帝制不再发生，民主共和可以安稳……非先将国民脑子里所有反对共和的旧思想一一洗刷干净不可。”（陈独秀：《旧思想与国体问题》，《新青年》第三卷第三号）新文化运动，就是向中国人灌输现代公民意识，帮助国人摆脱专制主义束缚，为实现真正民主奠定坚实的思想基础。

——摘自王铁群《新文化运动——中国的启蒙运动》

①人口基数大      ②人口素质偏低     ③新增人口多      ④人口分布不平衡

下列区域的地形与河流流向说法错误的是（　　）