死髓牙根尖部牙龈出现瘘管应考虑为
A.根尖囊肿
B.慢性牙髓炎
C.慢性根尖脓肿
D.慢性根尖肉芽肿
E.慢性牙周炎
参考答案:C
—Have you ever been to ' country?
—No, I have never been aboard.
A.an English—spoken
B.an English—speaking
C.a English — spoken
D.a English—speaking
龚自珍的《己亥杂诗》其125写道:“九州生气恃风雷,()。我劝天公重抖擞,不拘一格降人才。”