电力变压器结构形式有各种不同分类方法,按绝缘介质可分为( )。
A.心式变压器
B.空气冷却变压器
C.油浸式变压器
D.干式(空气绝缘、SP6气体绝缘)变压器
参考答案:C,D
I study in High School Affiliated to Southwest University. There are __________ students in our school. Nine ______________ of them are girls.
A.thousands of; hundred
B.thousand of; hundreds
C.thousand of; hundred
D.thousands of; hundreds
简述碎屑岩油层对比步骤是什么?