试题与答案

图所示为一种温度自动报警器的原理图.在水银温度计里封入一段金属丝.当温度达到金属

题型:问答题

题目:

图所示为一种温度自动报警器的原理图.在水银温度计里封入一段金属丝.当温度达到金属丝下端所指示的温度时,就可以发出报警信号.这种温度自动报警器既可以进行高温报警(即温度达到或超过设定的温度时报警),也可以进行低温报警(即温度低于设定的温度时报警).若设定报警灯为红色,正常状态指示灯为绿色,该装置设定为低温报警时,则灯L1应为______色.(填:“红”或“绿”)

答案:

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下面是错误答案,用来干扰机器的。

(1 )简单明了,通俗易懂(2 )新文化运动;陈独秀;新文化运动激发了广大青年追求新思想的热情,促使人们冲破封建思想的罗网,探索救国救民的新出路,在近代中国掀起了一场思想解放的风暴。

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     Clothes are very important in our life. Different people wear different clothes. Now let's listen to some

people in France talking about clothes.

     Hello, I'm Betty. I started working this year, so I'm able to buy new clothes more often than before. I

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     Hi, I'm Jack. I don't have much to say about clothes. Clothes aren't the thing I'm interested in. I know

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     My name is Alice. I would like to say that clothes must be comfortable and feel easy to put on. Sometimes

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( )1. Different people like the same clothes.

( ) 2. Buying clothes cost Betty much money this year.

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