问题 选择题

描述水的有关物理量之间关系的图象如下,其中正确的是(  )

A.

水的重力与质量关系

B.

水的质量与体积关系

C.

水温与加热时间关系

D.

水的蒸发量与时间关系

答案

A 水的重力与其质量成正比,反映在图象上也就是一个正比例函数.所以本选项正确;

B 由公式m=ρV知,在密度一定时,质量与其体积成正比,图象中体积变化而质量不变,所以图象不正确;

C 水温随加热时间的增加而升高,图象与事实不符,错误;

D 蒸发量随时间的增加而增加,图象与事实不符,错误.

故选A

改错题
改错题。
Dear John,                                             
    How are you? The summer holiday was coming.        
                                                       
I want stay at my aunt's for the whole holiday,        
                                                       
because they live in the country but I don't like      
                                                       
the noise of the big city. How are you going to        
                                                       
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    We had exam of the subjects last week. I did       
                                                       
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Here I send you some. I hope you'll like it.           
    Best wishes!                                       
    Martin                                             
           
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单项选择题