导致再生气加热炉排烟温度过高的原因有哪些？
参考答案：
有下列几个原因：再生气量过高、炉管外壁结垢、仪表故障
围绝经期综合征阴虚血燥证首选方为()
A.六味地黄丸
B.知柏地黄丸
C.加减一阴煎
D.两地汤
E.左归饮
I think English is ______ interesting subject. [ ]
A. very a
B. a very
C. an very
D. very an
