发电机与配电板连接电缆,其截面积应按()来选择。
A.发电机的额定电流
B.配电板的最大电流
C.电网所有负荷的额定电流之和
D.电网所有负荷的额定电流之和并留有一定裕量
参考答案:A
We were very much surprised at the way ___ she treated the old woman.
A.on which
B.by which
C.to which
D.in which
氧气呼吸器有两种分别是()。