多项选择题
A.双重保护B.器械备份C.多次复查D.全程监护
A.头盔 B.安全带 C.救生衣 D.保护绳 E.锁具
A.1%-2%；〉1%B.9%-10%；〈5%C.6%-8%；〈1%
A.OUTDOORB.OUTWARDBOUNDC.PPROJECTADVENTURED.ADVENTUREEDUCATION
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