下列有关构成物质粒子的说法,正确的是  (     ) A.分子一定比

下列有关构成物质粒子的说法,正确的是      

A.分子一定比原子大

B.分子、原子都是保持物质性质的粒子

C.分子、原子、离子都是构成物质的粒子

D.物质状态发生变化,是因为粒子大小发生变化

答案

C

相关题目

在100个零件中,有一级品20个,二级品30个,三级品50个,从
在100个零件中,有一级品20个,二级品30个,三级品50个,从中抽取容量为20的样本。 ①采用随机抽样法,将零件编号为00,01,02,…,99,抽取容量为20
(04年全国卷IV文)已知函数的图象有公共点A,且点A的横坐
(04年全国卷IV文)已知函数的图象有公共点A,且点A的横坐标为2,则   (    )       A.                   B.                
某船在静水中划行的速率为5m/s,要渡过40m宽的河,河水的流
某船在静水中划行的速率为5m/s,要渡过40m宽的河,河水的流速为3m/s,以下说法中正确的是(   )    A.该船渡河所用最短时间为10 s    B.该船可
81. We are about leaving when it begins to rain. 82.The task is difficult but h
81. We are about leaving when it begins to rain. 82.The task is difficult but her determine expression let me know she would not give up. 83.Please add to your score and see how many points you get
如图所示,橡皮条OA和OA′之间的夹角为0°时,结点O吊着质量
如图所示,橡皮条OA和OA′之间的夹角为0°时,结点O吊着质量为的砝码,O点恰好在圆心。现将A、A′分别移到同一竖直平面内的圆周上的B和B′点,且它
The National Park Service in the United States will mark its one hundredth anni
The National Park Service in the United States will mark its one hundredth anniversary in 2016. As it nears its second century, the Park Service plans to increase its educational programs for studen
Some false advertisements are taking the countryside woman as their targets, bec
Some false advertisements are taking the countryside woman as their targets, because they are easy to __________. A.take in        B.take on          C.take over         D
右图所示是民国时期的“北京五星啤酒贴花烟灰缸”的陶 
右图所示是民国时期的“北京五星啤酒贴花烟灰缸”的陶  瓷广告。作为直接证据,它可以用于研究 ①近代实业救国的思潮       ②近代中国商标

最新题目