颌下腺炎常见的原因是
A.牙槽脓肿
B.淋巴结炎
C.结石阻塞导管
D.冠周炎
E.血源性感染
参考答案:C
服装厂有一块76米布,已经用了34米,剩下的做男服,一套男服用布2.5米,可以做多少套男服?
Could you please the trash? [ ]
A. took out
B. take out
C. bring out
D. brought