肛周化脓性汗腺炎的西医治疗,下列可选用()
A.敏感抗生素
B.肾上腺皮质激素
C.抗雄性激素
D.50%硫酸镁溶液
E.X线照射
参考答案:A, B, C, D, E
The pupils hurried to the classroom ______ the bell rang. [ ]
A. until
B. as soon as
C. if
D. so that
斗轮机上最常见的供电分为哪两种供电方式?