根据以下材料，回答下列问题。
沧海桑田——西之新岛的诞生
在日本伊豆诸岛之南，小笠原群岛以西的海域中，有一座小岛，名叫西之岛。这座小岛以前的面积并没有这么大。你知道这是为什么吗？   
1973年4月的一天，这里的海底火山大爆发，海面上腾起了烟柱和水柱，海水大面积变色。两个月后，变色海域露出了1米多高的岩礁，可在几天以后，岩礁又消失了。同年9月，海底火山再次爆发。不久，火山口露出水面，在海面上形成了100多米长的小岛，因为这座小岛在西之岛附近，所以人们把它命名为西之新岛。新岛诞生之后，一直在移动，4个月后，这座新岛和原有的西之群岛连在一起，成为今天地图上的西之岛（或新岛）。
（1）日本是一个多火山、地震的国家。火山喷发留给人们的是恐惧，那么，我们应该如何看待火山喷发对人们生活和生产所产生的影响？
（2）西之岛的诞生，说明了地形是不断变化的吗？你还能举出一个或几个例子吗？
（3）西之岛的诞生，主要是由地球内部力量还是外部力量引起的？它们各自还有哪些表现形式？

用反证法证明“在同一平面内，若a⊥b，a⊥c，则b∥c时，第一步应假设（　　）

    We often face difficulties. It's a part of life. And in the 1times, just stopping is not right. We need to ask for help.

    When I am in trouble, I'm 2 enough to have a strong support (支持) group. I have a 3 relationship with my parents. When I face difficulties, my parents are the first ones I turn to. Many of the teenagers don't think our parents can 4 us. However, they have gone 5 situations that are even harder than those we're experiencing today. So why not 6 them and learn from them? If there are many situations when we don't want to ask our parents for 7, we can turn to our friends. It's also 8 to be able to receive their ideas. Whenever you need to ask for help, do it, 9 the help of others can often get you through your 10time!