塔机在工作时,司机室在门窗关闭的状态下噪声不应大于()
A.60dB
B.70dB
C.80dB
D.90dB
参考答案:C
某患者35岁,左下颌第三磨牙区和下颌升支渐进性膨隆,按压有乒乓感,X线片显示多房性囊肿样阴影,边缘不整齐,呈半月型切迹,囊内的牙根尖有不规则吸收影象,该患者的诊断可能是()
A.牙源性角化囊肿
B.成釉细胞瘤
C.牙源性黏液瘤
D.颌骨中央性血管瘤
E.骨化纤维瘤
I don't like these apples because they are ____. [ ]
A. well
B. fine
C. good
D. bad