锅炉调整布置是指炉膛和()之间的相互关系和相对位置关系。
A.排渣设备
B.汽泡
C.对流烟道
D.主蒸汽出口
参考答案:C
一 Is the girl ______ is interviewing the manager of that company your friend?
一 Yes, she is a journalist from CCTV.
A. whom
B. which
C. who
D. whose
凝结水的过冷现象是什么原因引起的?