叙述ARASHH0418的信号流？
参考答案：
信号流为：分折仪表（4~20mA）→本安栅→DCS（AD转换）→到U4联锁。
Sofia looked around at all the faces: she had the impression that she _____ most of the guests before.
A．has seen
B．had seen
C．saw
D．would see
我国纺织、制鞋业与意大利新兴工业区的特点相似之处有[ ]
A、以轻工业为主
B、以大中型企业为主
C、资本集中程度高
D、工业大多分散在小城镇
