以下不属于道岔检查内容的有（）
A.轨距
B.水平
C.三角坑
D.轨向
参考答案：C
Historically, _____ main material for making tables has been wood, but _____ metal and stone have also been used.
A．the; the
B．the; /
C．/; the
D．/; /
药事管理学科的基础理论包括哪5个方面？
