中国著名的三大特产是茶叶、丝绸、陶瓷。中国三大国粹是指中医中药、国画和京剧。
参考答案：对
Why did Andy Warhol name his work place "The Factory"().
A.Because he was able to make big profits out of his work.
B.Because he thought he was working like a garage mechanic.
C.Because he wanted to compare his own career to ordinary jobs.
D.Because he repeated many images of the same thing in his work.
安装浮选机的刮泡机构时，前后槽的刮板彼此应错开30°，而在同一室内的两组刮板应互成（）。
A、45°
B、60°
C、30°
D、90°
