单选题If the freeboard is more than 9 meters, we should rig（）.AgangwayBladderCpilot ladderDgangway combined with pilot ladder
单选题
If the freeboard is more than 9 meters, we should rig（）.
A
gangway
B
ladder
C
pilot ladder
D
gangway combined with pilot ladder
参考解析
解析：
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