按规定继电器使用类别,AC-11控制 

中间继电器的实质为_ 继电器,起到_ 的作用,文字表示符号为_ 。

热继电器主要参数有 _、 _ 、 _、_及  _ 。

负荷控制系统种类有：音频控制，无线电控制，配电线载波控制，   和混合控制。（  ）

继电器按继电保护的作用，可分为测量继电器和辅助继电器两大类，而(  )就是测量继电器中的一种。

热继电器主要参数有 _、 _ 、 _、_及  _ 。

中间继电器的实质为_ 继电器,起到_ 的作用,文字表示符号为_ 。

Can I （）a message or would you like to ring him on his mobile phone? 

回答题
    Eggs are my favorite food．I like them 21 ，hard-boiled，scrambled，or poached．I eat eggs for 22 ，lunch，and dinner．I eat eggs here，there，and everywhere!
    Eggs taste great．You can eat them by 23 or as part of any meal．Eggs are 24 used as an ingredient in many prepared foods．Can you think of any foods that contain 25 ?
    Eggs are really a perfect food．They are 26 in most of the nutrients we need to maintain good 27 ．When a baby chicken develops 28 an egg，the egg 29 and yolk are the only foods they need．
    Many people believe that eggs are 30 ．They point out that eggs contain a very high amount of cholesterol(胆固醇)．Too 31 of one kind of cholesterol in our blood can cause heart disease．
    There is no evidence that eggs 32 the harmful cholesterol in our blood．When we eat foods that are 33 in cholesterol，our bodies make 34 of it to balance，or adjust．
    If you want to enjoy a tasty and healthy food．eat plenty of 35

电压继电器线圈与电流继电器线圈相比,具有的特点是        。

.下列电器哪一种不是自动电器？  （  ）

输出继电器（OR）通过一对（）触点将PLC的控制信号传递给负载。