临床上最常见的根尖周病是（）
A.急性根尖周炎浆液期
B.急性根尖周炎化脓期
C.慢性根尖周炎
D.急性根尖周炎
E.根尖脓肿
参考答案：C
If you don't know the answer, you can say, "__________" [ ]
A. Thanks a lot.
B. I'm sorry. I don't know
C. Can you speak English?
D. Excuse me, Can you tell me the way?
下列( )选项是main( )方法的返回值类型。
A．int
B．void
C．boolean
D．static
