【单选题】

确保罗盘系统1和罗盘系统2是同步的。

A、Be sure that magnet plate system 1 and magnet plate system 2 are identical.
B、Make sure that compass system 1 and compass system 2 are synchronizeD.
C、Ensure that magnet plate system 1 and magnet plate system 2 are simultaneous.