2016年11月6日，河北6岁的聪聪跟着父亲在地里收白菜时，不慎掉落枯井中。事故发生后，当地政府立即展开救援，社会自发组织的爱心团体也加入到救援当中。这告诉我们（  ）

①生命至上，生命价值高于一切    ②要像珍爱自己的生命一样，珍爱他人的生命

③对生命要有一种敬畏的情怀        ④守护生命即是爱护自己的生命

示例：硫在空气、氧气中燃烧，化学反应相同，但反应现象不同．说明反应物的浓度不同，反应现象不同．请参照示例回答下列问题：

（1）碳在氧气不足、氧气充足的条件下燃烧，反应物相同，但产物不同．说明____不同，产物不同．

（2）二氧化碳与水反应，在常温下生成碳酸，在叶绿体、光照的条件下发生光合作用生成葡萄糖和氧气．反应物相同，但产物不同．说明____不同，产物不同．

（3）细铁丝（或铁粉）在氧气中能剧烈燃烧，铁钉（或铁制燃烧匙）在氧气中不能燃烧，反应物相同，但反应的速率不同．说明反应物的____不同，反应的速率不同．

____是植物非常重要的组成部分。根将植物牢牢地固定在____中，同时又从土壤中吸收植物生长所必需的水分和养料。

Happiness depends upon ourselves

    I stared at the word "Happiness", my creative-writing assignment (作业) about emotion, on my blank(空白的) paper. No format(格式) at all.

    It was not the lack of structure (结构） 1the word "happiness" that was 2 me. Anything else I could have 3 well, say, jealousy (嫉妒) or pain. But I was 4 to write about happiness.

    There was a 5 at my bedroom door. "Hey, Sarah?" asked a small voice. "Can I come in?" "Rachie." I said to my five-year-old sister. "I'm 6 now."

    "But this is important."

    I 7. "Okay, then." Rachie came in. "Um, I caught my favourite butterfly. It's 8 pretty. But I let it go because Mommy said it would die." "So, what's the 9?" I asked. "Well," she whispered 10 she were about to share a deep 11. "When I set it free, I was 12. Does that make me a mean person?" I 13. "Of course not. You were just happy it was free." I gave her a 14. "Now I have work to do." "What work?" she asked. I 15 my blank paper. "I have to write about happiness." "Oh, that's easy." "What's your happiness?" I asked. She thought a few seconds. "Butterflies," she said 16 and left.

    Butterflies! I thought about our 17. She was happy to catch the butterfly and happy to see it go. Maybe she was right. Butterflies 18 nothing but happiness. Maybe butterflies aren't exactly the 19 to happiness, but there is something to be said about the simple things in 20. And with that, I started to write.