单选题:The following figure shows a tree. Which one is its correspondin
The following figure shows a tree. Which one is its corresponding binary tree with the "first child/next sibling" representation?

@[A](3)
A.

B.

C.

D.

A.

B.

C.

D.

答案:A

@[A](3)
A.

B.

C.

D.

A.

B.

C.

D.

答案:A