标题: 885 section 20-22 [打印本页] 作者: colorsofthewind 时间: 2003-10-25 17:45 标题: 885 section 20-22 22. Unlike other arachnids, which have their nerve cells evenly distributed along their bodies, the scorpion’s nerve cells are clustered in its head, like a mammal’s. (A) bodies, the scorpion’s nerve cells are clustered in its head, like a mammal’s (B) bodies, the scorpion’s head had a cluster of nerve cells, as a mammal does (C) body, the scorpions has a cluster of nerve cells in its head, as a mammal does (D) body, nerve cells are clustered in the scorpion’s head, like a mammal’s (E) body, a cluster of nerve cells is in the scorpion’s head, like a mammal’s