优势菌是牙龈卟啉单胞菌的牙周疾病是
A．健康牙周 B．牙龈炎 C．慢性成人牙周炎 D．Down综合征 E．局部型青少年牙周炎
参考答案：C
Many of the road signs and advertising billboards are now in English, Beijing more accessible to foreigners.
A．making
B．made
C．to make
D．having made
叙述针灸治疗腰痛的主穴及其定位。
