The pilot lost control with the military base,       the plane crashed in the desert.

A．by means of which

B．for which

C．in case of which

D．as a result of which

下列科技成果中,能促进我国现代化建设的是（   ）

①秦山核电站和大亚湾核电站相继建成

②人造卫星发射成功

③导弹核武器试验成功

④杂交水稻的成功培育

A．①③

B．①②

C．①②③④

D．①②③