[填空题]
At what distance from the Earth will a spacecraft traveli,yhzfmy4f tpfk6o6 k5xu4jwty .9 u69h:2pdn ng directly from the ,+ f: 0sm1otxbgo nz:ika1z+s Earth to the Moon experience zero net force because the Earth and Moon pull+, xfs zbto:a+zs1g0mo:nk1i with equal and opposite forces? $\times 10^8$
