---

In observing rig motion while under tow，the period of roll is the time difference between（）.
A:zero inclination to full inclination on one side
B:full inclination on one side to full inclination on the other side
C:full inclination on one side to the next full inclination on the same side
D:zero inclination to the next zero inclination

---

出自：海船船员证

显示答案