氮气常温下化学性质（）。
A、活泼
B、不活泼
C、一般化
参考答案：B
Was __ at the air battle on June 8,1994, ____ was led by Captain Johnson ___ Peter lost his life?
A．it; when; that
B．that; that; who
C．it; which; that
D．it; which; when
采用滑升模板浇筑墩、台混凝土时，宜采用( )混凝土。
A．干硬性
B．低流动性或半干硬性
C．高流动性或湿软性
D．各式拌和的
