题干

重庆市高速公路收费站对过往车辆实施计重收费,某同学结合所学物理知识设计了如图所示的计重原理图,以下说法符合题意的是 (  )

A:计重表实质是一个电压表

B:当路面受到的压力增大时,计重表的示数减小

C:当路面受到的压力增大时,计重表的示数不变

D:当路面受到的压力增大时,计重表的示数增大

上一题 下一题 0.0难度 选择题 更新时间:2019-10-26 08:37:10

答案(点此获取答案解析)

D

同类题3

通读下面短文,掌握其大意,然后在各小题所给的四个选项中,选出一个最佳答案

    The red star over China is shining brightly on its sixty- fifth birthday. And why is that? There are many reasons. First of all, there is peace and prosperity(繁荣) in China. The country isn't at war and 1 Chinese are living better and more comfortable lives than at 2 in history. And things will get even better in the future.

    The Chinese economy is a world wonder — grow so quickly, so many buildings and so many new businesses. China is now the 3 economic country in the world only next to America. Some believe that China will be Number One 4 the year 2030. What amazing 5! And what does that mean for you? It means that there will be lots of chances for you to do good jobs and to use all of your talents.

    The rest of the world has started to take a closer 6 at China and they like what they see. In recent world wide survey, almost seventy percent of the people said they had a "positive image" of China. They thought China is beautiful and they are 7 in what is happening in China.

    And it is not only because of economy, 8 Chinese culture. Zhang Ziyi and Gongli are famous all over the world, as well as the movie director Ang Lee. Writers like Gao Xingjian and Ba jin have won international awards. And painters, such as Wu Zuoren are selling their works for record high prices. This 9 China seem pretty cool and it really is!

    So happy birthday, China! We are 10 you!