题目

Here are the five crowd-funding projects(众筹融资项目) that have raised the most money to date: 1. Star Citizen Goal: $500,000 Raised: $90 million to date Star Citizen is a multi-player Internet video game set in outer space. This crowd-funding project started on Kickstarter in 2012 with a goal of $500,000. Star Citizen raised over $2 million on Kickstarter. The company also uses its own website for crowd-funding and has raised over$90 million in totalto date. Star Citizen has had troubles even though it raised a record amount of money. Some are wondering what the company has done 如图为某生态系统示意图，请根据图回答．（1）、此生态系统中的植物属于 ，各种动物属于 ．（2）、该生态系统有 条食物链，请写出最长的一条： ．（3）、由于人们围捕狐狸，使老鼠和野兔的数量 ，导致植物被退化，后来停止围捕狐狸，几年后该生态系统又恢复平衡，这说明生态系统具有 ．