冷态启动时,采用()蒸汽冲动汽轮机将更有利于汽轮机金属部件的加热。
参考答案:低压微过热
Many people in Haiti died from the earthquake because they didn’t have to immediate rescue. [ ]
A. access
B. admission
C. approach
D. attention
外墙的墙脚通常称为______。它不但受到______的侵袭,而且______和外界机械作用力也对它产生危害作用,所以除了要求设置墙身______外,还应特别加强勒脚的坚固耐久性。