关于物体处于平衡状态的条件,下列说法中正确的是 (A)物体的速

关于物体处于平衡状态的条件,下列说法中正确的是

A)物体的速度为零      B)物体的速度大小不变

C)物体的速度方向不变  D)物体所受合力为零

答案

D

相关题目

All the people were shocked by what the little girl      when she was cheat
All the people were shocked by what the little girl      when she was cheated and sold to the mountain village. A. went over     B. went through        C. got along with     D. got
关于x的一元二次方程有 两个不相等的实数根,则m的取值范
关于x的一元二次方程有 两个不相等的实数根,则m的取值范围是                                               A.m ≥  B.m ≤
如图,在矩形ABCD中,∠B的平分线BE与AD交于点E,∠BED的平分
如图,在矩形ABCD中,∠B的平分线BE与AD交于点E,∠BED的平分线EF与DC交于点F,若AB=9,DF=2FC,则BC=    .(结果保留根号)
In the good care of the nurses, the boy is ____ recovering from his heart operat
In the good care of the nurses, the boy is ____ recovering from his heart operation. A. quietly   B. actually   C. practically  D. gradually
能被小肠毛细淋巴管吸收的营养物质成分是           
能被小肠毛细淋巴管吸收的营养物质成分是                     (  )   A、氨基酸     B、脂肪酸     C、葡萄糖     D、无机盐
He can play soccer very            . A. much            
He can play soccer very            . A. much                    B. well                C. good     D. nice
①不过,这种创造性的思维是否任何人都具备呢?是否存在
①不过,这种创造性的思维是否任何人都具备呢?是否存在富有创造力和缺乏创造力的区别呢?②某心理学专家小组以实际从事创造性工作的人与不从
下列不符合板块构造学说理论的是 A.全球分为六大板块   
下列不符合板块构造学说理论的是 A.全球分为六大板块                             B.各大板块处于不断的运动之中 C.板块内部地壳比

最新题目