下列哪项人为因素会对生态系统造成全面破坏 [ ] A．乱_爱下问搜题

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问题选择题

下列哪项人为因素会对生态系统造成全面破坏　　　　　　　　　　[ ]

A．乱捕滥杀　

B．环境污染　　

C．使用化肥农药　　

D．滥采乱挖

答案

B

选择题

旋转后得到的图形与原图形相比（）

A 形状和大小都发生变化 B 形状不变，大小发生变化

C 形状改变，大小不变 D 形状和大小都不发生变化

完形填空

I recently overheard something that surprised me. I heard that people who win the lottery ( * * ) are__21_for about 3 weeks. And then they go back to their__22__state of being before they won the money.I__23__that they would have been happy for a much longer time.
The reason for this is that__24__we try to change how we feel by using something outside of ourselves，like winning the lottery，or getting a new car or house，it never__25__.The resulting feelings of happiness are often fleeting (飞逝的)．We cannot__26__them for very long.In some way，it may be a good thing.It reminds us that happiness really does come from within and is__27__to us at any moment.True happiness has__28__to do with what is happening outside；it is an inside job.Happiness is a__29__.
We can make the decision to be happy for one day，when we__30__in the morning，every morning.We can find something that brings us great __31__，like sitting outside in the garden under an old tree and__32__the birds sing，or watching the dog or cat play，and just__33__the moment.It is our__34__state and we need only allow it in.At any moment，we can__35__，take a deep breath，and remember who we really are，and why we came here，and that truly is to__36__joy and the aliveness of being.
“Happiness is like a butterfly which，when run after，is always __37__our reach，but，if you will sit down___38__，may fall upon you，” said Nathaniel Hawthorne，an American novelist.So，today，no matter what is going on in your own__39__，stop and take a few moments to breathe deeply and just__40__to be happy，whatever that means to you.

C．listening to