The electrical power is supplied to main load buses _____(靠闭合)the external power connector and the _____bus tie breakers.（有关的）
A.by closing, continuous;
B.by closing,associated;
C.by stop, connected;
D.by applying, associated;
正确答案是B
The electrical power is supplied to main load buses _____(靠闭合)the external power connector and the _____bus tie breakers.（有关的）
A.by closing, continuous;
B.by closing,associated;
C.by stop, connected;
D.by applying, associated;
正确答案是B