下列关于力的说法中，正确的是A．合力必大于分力B．运动物体所受

下列关于力的说法中，正确的是

A．合力必大于分力

B．运动物体所受摩擦力的方向一定和它运动方向相反

C．物体受摩擦力作用时一定同时受弹力，而且在同一接触面上的这两个力的方向一定相互垂直

D．处于完全失重状态下的物体不受重力作用

答案

解析:略

相关题目

--Is there any possibility of the film ___________ in Paris International Festiv

--Is there any possibility of the film ___________ in Paris International Festival? --Not in the least, because the audience generally think little of it. A. trying out B. tried out C. t

_______ how to do the homework, I went to ask my teacher for help. A. Not

_______ how to do the homework, I went to ask my teacher for help. A. Not to know B. Not knowing C. Knowing not D. Not known

The world is divided into two main parts. The difference is ___41___one part is

The world is divided into two main parts. The difference is ___41___one part is rich and the other is poor. In the poor part, a lot of people ___42_____get enough to eat. In the rich part, a lot of

One afternoon I was sitting at my favorite table in a restaurant, waiting for th

One afternoon I was sitting at my favorite table in a restaurant, waiting for the food I had ordered to arrive. Suddenly I ___36___ that a man sitting at a table near the window kept glancing in my di

下列有关物质分类的说法，不正确的是（） A．CO2、SO2是非

下列有关物质分类的说法，不正确的是（） A．CO2、SO2是非金属氧化物，也是酸性氧化，它们属于电解质 B．KNO3是钾盐、硝酸盐、也是正盐 C．H2SO4是

富兰克林·罗斯福说：“国家的义务之一，就是要照顾那些在

富兰克林·罗斯福说：“国家的义务之一，就是要照顾那些在逆境下如无别人帮助即难以为生的公民……政府必须给这些不幸的公民以援助……”罗斯福

The cost of organic food is higher than ___________ of conventional food beca

The cost of organic food is higher than ___________ of conventional food because the organic price tag reflects more closely the true cost of growing the food． A. it

关于右图所示生理过程的叙述，正确的是 A．物质1上的三个

关于右图所示生理过程的叙述，正确的是 A．物质1上的三个相邻碱基叫做反密码子 B．该过程需要mRNA、tRNA、rRNA参与 C．多个结构1共同完成一条物质2的

下列关于力的说法中，正确的是A．合力必大于分力B．运动物体所受

答案

相关题目

最新题目