桑基鱼塘分布在我国长江三角洲、珠江三角洲一带的水乡，是一种典型的水陆物质和能量交换型生态工程（如图）；表格数据表示有机物从桑树传到蚕的能量流动情况，试分析桑基鱼塘的物质和能量流动途径，回答下列问题．

（1）图中生态系统的食物网简单，与森林生态系统相比，它的____ 能力较弱，其____ 稳定性也相应较低．

（2）将蚕沙（粪便）投入鱼塘供给鱼食用，蚕沙中所含的能星属于第____ 营养级所含的能量，蚕沙中的碳元素以____形式流向鱼，鱼体内的碳元素以____ 形式流向桑树．

（3）根据表格数据可知，蚕同化的总能量为____ kJ，表中①部分的能量用于蚕的____ ，储存在蚕的有机物中．

青春期的少年需要与同龄人和父母平等交往，渴望他人和自己一样彼此间敞开心灵来相待。但由于每个人的性格、想法不一，他们的这种渴求找不到释放的对象，只好把心理话诉说在“日记”里。这反映了青春期的少年遇到了（    ）

用方框中所给的词语的适当形势填空，使短文正确、通顺、连贯（每词限用一次）

Yesterday I visited the Hong Shan Forest Zoo. I was____ to find few people there. ____ are very important places. They provide homes____ many endangered animals .They also help to educate the public about
____ them . If we ____ our zoos, they won’t have enough money to take care of so____  fine animals. Therefore, People should go and visit the zoos more often to learn about animals and help to protect them ____ .
However, some people don’t think so. They think zoos are terrible places for animals to live.“I’ve visited a lot of zoos in my life, and I have never seen one I like or one that____ animals to live in .”Jenny said The animals____ in small cages and can ____ move at all .What’s more, they are only given food once a week That’s terrible.