离心机组冲转前应满足（）
A、暖管合格
B、压缩机引合格的工艺气
C、机组盘车
D、启动允许条件满足
参考答案：A, B, C, D
He________ the police when he found his house broken into.[ ]
A. contacted with
B. contacted
C. made contact
D. was in contact with
有“东方民间艺术之宫”、“岭南建筑艺术之宫”美誉的是（）。
A.德庆悦城龙母祖庙
B.广州南海神庙
C.陈家祠
D.佛山祖庙
