加拿大超过半数的航空及太空工业位于那一个省份？
More than half of canada 's Aeronautics and space industry are located in which province ?
地球政府为了贸易，采矿，军事和政治目的正发展太空工业研究。
The world 's powers are developing space for industrial research , trade , mining military purposes and political prestige .
太空工业