正确答案: C

24小时

题目：闭合性损伤超过______后，应改用热敷，理疗或中药外敷等以促进吸收

解析：C

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举一反三的答案和解析：

[单选题]After a fire has been extinguished in a closed space, personnel may safely enter the space when

all smoke and toxic fumes are removed and an adequate oxygen supply is present

[单选题]船舶遇难后应尽快放下救生艇，若是机动艇最好在何时启动机器?

艇着水前

[单选题]在下列钢丝绳中，哪种子强度最大，但柔性最差，用作绞车配合的拖索和系船索？

硬钢丝绳