下列药物中,与甲氨蝶呤长期大量合用,可引起膀胱移行细胞癌的是()
A.糖皮质激素
B.抗生素
C.抗病毒药物
D.维生素类
E.中药饮片
参考答案:A
— Are there any post offices near here?
— Yes, _______________.[ ]
A. they are
B. there are
C. are there
车床的总装配包括()和()工作两部分。