下面列举的是温带草原生态系统中的几种生物. (1) 连接的食物链有条.它们彼此交错连接形成. (2) 写出里面任何一条食物链. (3) 有毒质DDT沿着食物链积累.该生态系统中,DDT积累得最多的生物是. 答案:【1】3【2】食物网
【1】草→鼠→鹰
【1】鹰Did you know ________ with his car?
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A.what is the matter
B.what was the matter
C.what the matter is
D.what the matter was