输送机启动时各台间要留有几秒钟的时间间隔，以防止（）叠加起来，电流太大而产生过大的电压降，造成启动困难。
参考答案：启动电流
—Did you have any difficulty catching yesterday’s lecture?
—No. The professor spoke very clearly to make his speech easy _____.
A．understood
B．understanding
C．to be understood
D．to understand
分酸分离器工作压力范围为11Mpa~19Mpa
