阅读短文，从方框中选择单词，根据实际情况用适当的形式，使短文意思完整、通顺。每空一词，每词只能用一次。

swim,  four,  snow,  after,  weather

    We know that there are ____ seasons（季节）in a year: spring, summer, autumn and winter. In spring, the ____ is warm. Everything grows fast. It is a good season for hiking (远足). Summer comes ____ spring. It is usually hot in summer. The children like to go ____. They are very happy in the cool water. It often rains and sometimes it rains heavily. In autumn, it is cool. The farmers are busy. It is often cold in winter. Sometimes it ____, and all the houses, trees and other things become white. The world is so beautiful in this season and people are very happy!

已知函数f（x）= $\{\begin{array}{l}\frac{1}{x}，x>1，\\ x^3，-1\le x\le 1\end{array}$ 若关于x的方程f（x）=k（x+1）有两个不同的实数根，则实数k的取值范围是____．

一战期间，陈独秀等人在上海出版一份以青年为对象的刊物，发刊词有这样两句话：“笃古不变之族，日就衰亡；日新求进之族，方兴未已。”作者“求变”主要针对 （  ）

国家发改委8月16日称，2016年下半年影响后期价格走势的因素错综复杂，价格运行不确定性仍然较强，但经济基本面不会出现显著变化，可以实现年初确定的3%左右的价格调整目标。上述材料表明（  ）

①意识活动具有主动创造性               
②运动是静止的特殊状态

③运动是永恒的、绝对的和有条件的       
④世界是绝对运动和相对静止的统一

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