目前国内外采用比较普遍的喷涂室是（）。
A.文丘里行
B.喷射水洗型
C.水幕喷洗型
D.旋风动力管型
参考答案：D
Ellen was a painter of birds and of nature, _____, for some reason, had withdrawn from all human society.[ ]
A. which
B. who
C. where
D. whom
蔡加尼克效应
