What is the thing that pull us to the ground?, Friction, Force, Gravity, Which picture shows gravity?, what is gravity?, let you to float, pulls you toward the ground, is a motion, is this picture shows gravity (yes/no), Yes, No, Gravity is ____________., Contact force that pulls an object toward, Noncontact force that pulls an object toward

排行榜

視覺風格

選項

切換範本

恢復自動保存: ?