在下列指标中，属于润滑油的指标是（）。
A.粘度
B.闪点
C.滴点
D.针入度
参考答案：A, B
It was _____ he said _____ disappointed me at that time.[ ]
A. what ; that
B. that ; that
C. what ; what
D. that ; what
如何进行循环流化床锅炉布风板均匀性试验？
