用能单位不用制定文件化的能源采购规范。
参考答案：错
把一个数（0除外）乘0.01，也就是把这个数缩小到它的十分之一．…______．
Unfortunately, when I arrived she ________, so we had only time for a few words.
A．just left
B．had just left
C．has just left
D．was just leaving
