烧伤后内脏并发症常见的是()
A.肺部并发症
B.肾功能不全
C.心功能不全
D.应激性溃疡
E.肺水肿
参考答案:A, B, C, D, E
Whales live on ______
A.tiny plants and animals in the sea
B.the grassy slopes of northern Canada
C.their young in cold winter
D.the abundant seafood in tropic waters
某二叉树中度为2的结点有18个,则该二叉树中有______个叶子结点。