d选项:that dolphins have the ability of recognizing themselves in mirror——an ability that is often considered as a sign of self-awareness——and spontaneously grasping.
og解释说of recognizing和spontaneously grasping不平行,为什么不可以看成是recognizing和spontaneously grasping两者平行呢_(:з」∠)_想请教一下大神~
类似的结构像Fossils were found in a and b.和I want to eat, drink, and go to sleep.又是对的呀_(:з」∠)_有点晕