When two or more systems are served by a single power source, that power source will be discussed separately under the appropriate chapter heading. ( )
A.If a single power source serves more than three systems, it will be discussed in one of the three systems. B.If a single power source serves two or more systems, it needs to be discussed under either one system under appropriate chapter heading. C.If a single power source serves two or more systems, each system should discuss it under appropriate chapter heading正确答案B
