问题
问答题 简答题
继电器与接触器的主要区别是什么？
答案
参考答案：
（1）继电器是用来切换自动控制，电力系统的保护，电讯、仪表和电子装置等小电流电路，而接触器是用来控制电动机，电热设备和其它大功率系统的动力开关装置；（2）继电器可以对各种电量以及压力、温度等非电量作出反应而绝大部分接触器只是在一定电压下动作。
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继电器与接触器的主要区别是什么？
参考答案：
（1）继电器是用来切换自动控制，电力系统的保护，电讯、仪表和电子装置等小电流电路，而接触器是用来控制电动机，电热设备和其它大功率系统的动力开关装置；（2）继电器可以对各种电量以及压力、温度等非电量作出反应而绝大部分接触器只是在一定电压下动作。
| 阅读理解。 | ||
| Good morning! Welcome to our food shop. We have many things on sale. Please come in and have a look! Please look at our ads(广告).Would you like some of them? Some food isn't on the ads, such as(如) chicken and fish. The chicken is $20 a kilo and the fish is $25 a kilo.
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| 正确的（T）错误的（F）。 | ||
| ( )1. The ads are for a clothes shop. ( )2. Mrs Green can buy three kilos of eggs with $15.00. ( )3. You have only $7.00,and you can buy three bottles of orange juice ( )4. You have $60.00 now.You can buy 15 kilos of apples or 2 bags of rice. ( )5. Fish isn't on the ads, but we can buy it in the shop. |