佛教传入我国是在[ ]
A.西汉初年
B.西汉末年
C.东汉末年
D.三国以后
答案:B
The earliest process for mining gold is panning, which involves using a circular dish with a small pocket at a bottom.
治疗膀胱癌的首选药物是()
A.卡莫司汀
B.环磷酰胺
C.氟尿嘧啶
D.塞替派
E.巯嘌呤