friction force on the rack

friction is a force that always acts an opposition movement off-the-rack Look,the iacket on the rack is ____ yours A.the same as B.sa 如何判断完全及物动词I hung my coat on the rack.中的hung是及物动词,但是后面的on the I gotta hit the rack.英语翻译下 She never buys off the rack. 英语翻译Friction between the catheter wall and the embolic mater Without the friction between their feet and the ground,peopl 英语翻译Friction and LubricationIn many of the problems thus far ..A flag is being blown by the wind.the force on the flag is “THE FORCE OF The strength of the force of gravity depends on what?请问是不是说重