治疗急慢性金黄色葡萄球菌骨髓炎的首选药物是（）
A.克林霉素
B.乙酰螺旋霉素
C.四环素
D.氯霉素
E.妥布霉素
参考答案：A
下列税种中，属于财产课税的是（）。
A.房产税
B.消费税
C.营业税
D.印花税
Karl Marx _____ his English study in his fifties, and translated several English books while he was still in prison. [ ]
A. took up
B. took in
C. took off
D. took on
