在选路时，控制台上始、终端按钮一直闪光，说明什么？
参考答案：
说明始、终端按钮继电器在吸起状态，进路未选出来。
You must _____ yourself and _____. [ ]
A. look for; keep healthy
B. look after; stay healthier
C. look out; stay healthy
D. look after; keep healthy
临产时可扪得产妇中指本节有脉搏跳动、称
A．迟脉B．离经脉C．滑脉D．妊娠脉E．临产脉
