Do you know ______________?---At 8:45 on March 8th,2014.

A．what time did the plane from Malaysia to Beijing lose connecting(失联)

B．what time the plane from Malaysia to Beijing lose connecting

C．what time does the plane from Malaysia to Beijing lose connecting

D．what time the plane from Malaysia to Beijing lost connecting

不用任何试剂就可鉴别的是（　　）

A．氨水和AlCl₃

B．KAlO₂和KHSO₄

C．FeCl₃和KOH

D．Na₂CO₃和HNO₃