如图所示，使一薄锯条一端固定，现分别使用不同的力使其发生如图（1）、（2）、（3）、（4）中所示的形变，如果F₁=F₃=F₄＞F₂，通过下列四幅图所示的情景具体归纳出力的作用效果与哪些因素有关？

结论：力的作用效果与　____ 　、____ 　　、　____ 　有关．

你觉得人类与自然是一种什么关系？人类该如何与其他生命相处？ 

根据短文理解，从A、B、C、D四个选项中选择最佳答案填空。

    Somebody says, “Time is money.” But I think time is 1 important than money. Why do I think so? Because when money is over, we can get it back. But when time is 2, it'll never be 3. That's 4 we shouldn't waste time.

    It goes with saying that the 5 is usually limited（有限的）. Even a second（秒） is very important. We should make full use of our time to do 6 useful.

    But a lot of people do not know the importance of time. It is a pity. They spend their limited time smoking, drinking, sleeping and 7. They do not know that wasting time means wasting part of their own 8.

    In a word, we should save time. We shouldn't 9 today's work for tomorrow. Please remember that we have 10 time to waste.