根管预备的深度应止于牙本质牙骨质界,通常距根尖孔约()
A.0.5mm
B.1mm
C.1.5mm
D.2mm
E.根尖1/3处
参考答案:B
____ much we dislike the idea of begging in the street, we should still show consideration
for those who are in difficult situations. [ ]
A. However
B. How
C. Whatever
D. No matter
根据《噪声污染防治法》,在城市市区范围内向周围生活环境排放建筑施工噪声的,应当符合国家规定的( )。
A.城市区域噪声排放标准
B.城市生活区域环境噪声排放标准
C.城市区域边界噪声标准
D.建筑施工场界环境噪声排放标准