（）是转辙器的主要部件，通过连接杆与转辙机械相连。
A.基本轨
B.尖轨
C.转辙机械
D.连接部分
参考答案：B
— ____ you read the newspaper?
— Yes. I ____ it on the bus while I was on my way to work.
A．Have; read
B．Did; read
C．Have; have read
D．Did; have read
地榆的归经是( )
A．肝、胃、大肠经B．肝、脾、肾经C．肺、胃、膀胱经D．肺、脾、肾经E．肝、脾、膀胱经
