供配电系统有哪些主要设备?
参考答案:
(1)高压配电室。
(2)变压器。
(3)低压配电室。
在平面直角坐标系中
(1)在图中描出A(-2,-2),B(-8,6),C(2,1),连接AB、BC、AC,并画出将它向左平移1个单位再向下平移2个单位的图象.
(2)求△ABC的面积.
— I don't think I want to live in the dormitory next year.
— But check out the cost first. I wouldn't be surprised if you ______ your mind. [ ]
A. changed
B. will change
C. have changed
D. would have changed