题目

下列现象中的物体属于生物的是 A．弹钢琴的机器人                B．馒头上长出的“黑毛” C．能慢慢长大的钟乳石            D．火山爆发时喷出的岩浆 答案：B In the reading-room, we found Winifred ________ at a desk, with her attention ________ on a novel． [　　] A． sitting; fixing B． seating; fixed C． sitting; fixed D． seated; fixing