题目
A.180S
B.60S
C.120S
D.240S
第9题
A.扎止血带时间不宜超过2h,每30min松带一次.间歇30s--1min
B.扎止血带时间不宜超过1h,每30min松带一次.间歇30s--1min
C.扎止血带时间不宜超过1h,每30min松带一次.间歇30min--1h
D.扎止血带时间不宜超过1h,每40min松带一次.间歇30s--1min
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