Radio beacon can be activated（）in case of distress.<br>A:only automatically<br>B:only manually<br>C:both automatically and manually<br>D:only by remote control

Radio beacon can be activated（）in case of distress.
A:only automatically
B:only manually
C:both automatically and manually
D:only by remote control

出自：海船船员证

提示：
同一【IP】的非会员用户每天可免费获取10次答案

收藏本站【zk.995w.com】，下次访问不迷路

本站试题总数:【10244552】个 (题库试题定时更新)