题目

请阅读下面短文，按要求完成所给任务，并将答案写在相应的位置上。Many people do not like to stay at home on holidays. They want to go out to see something different or do something exciting. 44. So people from the countryside go to the city and people from the city go to the countryside for holidays. During the holidays, trains, buses and planes are all very busy: It is very hard to buy train tickets or plane tickets. Many people take cars or buses for traveling.Last May Day my family went to the countryside by car for our holiday. 45.路上有很多车辆， 我们6．如图1表示利用人工生态湿地净化生活污水的原理示意图，如图2表示该生态系统的碳循环过程．请据图回答问题：（1）在研究该生态系统的绿藻时，常用抽样检测法调查种群密度，而主要依据种群的年龄组成来预测芦苇数量的变化趋势．（2）绿藻等藻类出现垂直分层现象的生态因素是光质．（3）输入该湿地的能量有生产者A固定的光能和生活污水中有机物的化学能．图2中C的能量最多为B的20%？否（是、否），原因是C属于分解者，不纳入营养级，不满足生态系统后一级生物量为前一级生物量的10%--20%（十分之一法则）．（4）当生活污水过度流入人工生态湿地会使该生态系统遭到破坏，这说明生态系统的自我调节能力是有一定限度的．