题目

. Parents and kids today dress alike, listen to the same music, and are friends. Is this a good thing? Sometimes, when Mr. Ballmer and his 16-year-old daughter, Elizabeth, listen to rock music together and talk about interests both enjoy, such as pop culture, he remembers his more distant relationship with his parents when he was a teenager. “I would never have said to my mom, ‘Hey, the new Weezer album is really great. How do you like it?’ ” says Ballmer. “There was just a complete gap in taste.” Music was not the only gulf. From clothing and hairstyles to activities and expectati如图是某生态系统部分生物间关系的简图，请据图回答下列问题（1）该图中属于生产者的是 ， 图中所有的动物属于 ．（2）如果为了杀虫而在该生态系统中喷洒农药，则体内有毒物质积累最多的生物是 ．（3）图中的几种生物中，数量最多的是 ．（4）在这个生态系统中，各种生物的数量和所占比例总是维持在相对稳定的状态，这种现象叫做 ．