取粉末少量加清水调和,涂于指甲上,能“挂甲”的药材是()
A.鹿茸
B.蟾酥
C.羚羊角
D.牛黄
E.僵蚕
参考答案:D
The government is now planning to locate a new school low-income families are living.
A.which
B.in which
C.where
D.around which
某二叉树有5个度为2的结点,则该二叉树中的叶子结点数是______。
A.10 B.8C.6 D.4