問題詳情
4.tWhich of the following statements of gravitationa] force is wrong?
(A)tIt is a conservative ibrce.
(B)tObjects with masses always attract each other.
(C)tIt obeys Newton's third law.
(D)tThe value of gravitational constant G is diffwent on the moon.
(E)tAll of the above are correcL
參考答案
答案：D
統計：A:0,B:0,C:0,D:1,E:0
難度：計算中