喉管式喷嘴利用高速喷射的蒸汽，使进料在进入提升管时形成强烈的（）脉动喷射流与周围介质发生撞击而破碎。
A.湍流
B.滞流
C.紊流
D.稳流
参考答案：C
决定Ig型和亚型的部位
A．VL十VHB．VL+CLC．绞链区D．CHE．CL
---- Have you heard of Steven Jobs, the co-founder and CEO of Apple?
---- Yes, but it’s a pity that he has _____ for a half year..
A．died
B．been dying
C．been dead
D．death
