My English teacher has a beautiful ______. [ ]
A. look
B. looking
C. hair
D. looks
答案:A
狼疮性肾炎病理分六型:Ⅰ型________;Ⅱ型________;Ⅲ型________;Ⅳ型________;Ⅴ型________;Ⅵ型________。
多级压缩气压机可以不使用中间冷却器。