下列关于弹力的说法中,正确的是 (    ) A.相互接触的物体之间一

下列关于弹力的说法中,正确的是 (    )

A.相互接触的物体之间一定存在弹力作用

B.只有受弹簧作用的物体才受到弹力作用

C.只有相互接触并发生形变的物体间才存在弹力作用

D.弹簧的弹力总是跟弹簧的长度成正比

 

答案

C

解析:略

 

相关题目

已知为虚数单位,为实数,复数在复平面内对应的点为,则
已知为虚数单位,为实数,复数在复平面内对应的点为,则“”是“点在第四象限”的   (    )        A.充分而不必要条件            B
《十二铜表法》规定:债权人可将无力偿还的债务人,交付
《十二铜表法》规定:债权人可将无力偿还的债务人,交付法庭判决,直到将其戴上足枷、手铐,甚至杀死或卖之为奴……。这一规定主要维护了 A.法
I like music very much, pop songs particularly. Every evening then I am doing h
I like music very much, pop songs particularly. Every evening then I am doing homework and at weekends when I at home, I always play some of my favorite songs on my tape recorder. The familiar patt
(4分)你从一个受精卵发育成长为一个小帅哥、小美女,让
(4分)你从一个受精卵发育成长为一个小帅哥、小美女,让我们看到了生命的奇妙变化。下图所示为人体组织形成过程。请分析回答问题:(1)图中①
A~J为中学化学中常见的几种物质。它们有如图转化关系:
A~J为中学化学中常见的几种物质。它们有如图转化关系: 常温下,A为生活中常见的无色无味液体,F、I为气体单质,B、D为常见金属,I分子中电子总
Every destination has its to-do list----go to Pairs and not climb the tower? No,
Every destination has its to-do list----go to Pairs and not climb the tower? No, And if you take a trip to Tasmania, give yourself two weeks and you can pretty much do all the must-sees in the island
—Next week I will go to a job interview. Will you give me some suggestions?
—Next week I will go to a job interview. Will you give me some suggestions?        —Smiling is a great way to make yourself ________. A.stand out  B.turn out    C.work out  D

最新题目