My goodness. How lucky we are! If there had been places for us on that aero-plane, we ________dead now.

A．will be

B．would be

C．would have been

D．had been

影响铝酸钠溶液稳定性的主要因素是（）。

A、溶液苛性比值、温度、氧化铝浓度

B、溶液苛性比值、温度、搅拌

C、温度、氧化铝浓度、溶液中杂质