It was ____________ day. [ ]
A. wind
B. windy
C. a windy
答案:C
游离AA含量最高的部位是()。
A.骨骼肌
B.肝
C.肾
D.血浆
E.淋巴液
试述影响超临界直流锅炉汽温变化的因素?