中国古代建筑的等级制度体现在（）方面。
A.屋顶式样
B.开间数
C.色彩
D.以上都是
参考答案：D
— Who ____________ to clean the blackboard ____________ afternoon?
— The students of Team Two are.[ ]
A. going; this
B. are going; before
C. want; this
D. would like; in the
变压器、电抗器带电前本体外壳及接地套管等附件应（）
