当发现有心包积液体征时,如奇脉、肝大、颈静脉怒张,估计其液体量已超过()
A.<30ml
B.50ml
C.150ml
D.250ml
E.500ml
参考答案:E
She _______ her child on her back. [ ]
A. carried
B. brought
C. got
D. took
下列有关二叉树的说法,正确的是 ______。
A.二叉树的度为2
B.任何一棵二叉树中至少有一个结点的度为2
C.度为0的树是一棵二叉树
D.二叉树中任何一个结点的度都为2