2.
“中国月球着陆探测器”在中国航天馆揭开神秘面纱\(.\)它将带着中国制造的月球车,在\(38\)万千米之外的月球表面闲庭信步\(.\)月球的表面长期受到宇宙射线的照射,使得“月壤”中的\(\rlap{_{2}}{^{3}}He\)含量十分丰富,科学家认为,\(\rlap{_{2}}{^{3}}He\)是发生核聚变的极好原料,将来\(\rlap{_{2}}{^{3}}He\)也许是人类重要的能源,所以探测月球意义十分重大\(.\)关于\(\rlap{_{2}}{^{3}}He\),下列说法正确的是\((\) \()\)