皮皮学，免费搜题
登录
搜题
【多选题】
安全PLC主要应用于哪些场合？A.
危险程度高、可靠性安全性要求特别高，若出现故障或失去控制，会造成巨大的经济损失或人员伤亡的领域。
B.
远程遥控、无人值守的系统以及维护费用十分昂贵的系统也需要安全 PLC 系统进行监控和管理。
C.
大型分布式工业控制系统。
D.
危险化工产品生产控制、钢铁冶金过程控制、大中型石油化工生产、油气存储、输油管监控、燃烧锅炉管理控制、海上钻井平台安全保障系统等。
手机使用
分享
复制链接
新浪微博
分享QQ
微信扫一扫
反馈参考答案：
举一反三
【单选题】Which word can best describe the feeling of most people waiting for the train?
A.
joyful.
B.
anxious.
C.
excited.
D.
uncertain.
【简答题】How did the author describe the feeling of self-guilt or even self-hatred of Madame when she ran across the poor on the street?
【单选题】Which of the following words can best describe the feeling of the Chinese people when they talk about their country?
A.
Interested.
B.
Proud.
C.
Encouraged.
【单选题】Which word can best describe the feeling of the father when Christmas was coming?
A.
Excitement.
B.
Happiness.
C.
Sadness.
D.
Disappointment.
【单选题】Which expression can best describe the feeling when a student has to see his headmaster?
A.
A broken heart .
B.
Lose one’s heart.
C.
Heart in one’s mouth.
D.
Have a heart .
【简答题】Would you please use some adjectives to describe the feeling when you come to a new environment ? For instance, what’s your feeling the first day you came to college?
【简答题】若a=0，则 =（ ）；若 =3，则x=（ ）。
相关题目：
参考解析：
知识点：
题目纠错 0
发布
