在“今火帛之臭亦烈矣，而尔顽若不知”中，“顽若”的意义是（）
A.笨拙貌
B.愚蠢貌
C.顽皮貌
D.简慢貌
参考答案：B
If it ____for the snow, we____ the mountain yesterday.
A．were not, could have climbed
B．were not, could climb
C．had not been, could have climbed
D．hadn’t been, could climb
完全二叉树中，若一个结点没有左孩子，则它必是树叶。( )
