A:A对B的水平推力为6N
B:B物体受4个力作用
C:A物体受到水平面向左的摩擦力,大小为6N
D:若FA变为40N,则A对B的推力为32N
Halloween is _______ October 31st . ( )
quàn gào
tú huà
shén qíng
jiǎo dù
yuàn yì
wéi nán
____
chuāng hu
bāng zhù
tè bié
bāng máng
hē shuǐ
róng yì