– Have you ever been to the city before?

– No. This is the first time I _____ here.

A．was

B．have been

C．come

D．am coming

脉搏骤起骤落，犹如潮水涨落，此种脉搏称为

A．奇脉

B．迟脉

C．重搏脉

D．水冲脉

E．交替脉