道是客观存在的，而非虚无缥缈的，这是由道的什么特性决定的？（）
A.本原性
B.辩证性
C.不可命名性
D.哲学性
参考答案：A
根据句意及首字母提示，补全单词。
1. He is a c_____boy, his English is very good.
2. —What are your favorite a_____?
—Monkeys. They are very cute.
3. —What time is it now?
—It's a q _____past eight.
4. It's 8:00 in the morning now. Let's s_____school.
5. P_____only lives in China.
在深度为5的满二叉树中，叶子结点的个数为( )。
A．32
B．31
C．16
D．15
