【名词&注释】
钢丝绳(wire rope)、救生艇(boat)
[单选题]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
A. 1小时
B. 12小时
C. 24小时
D. 48小时
查看答案&解析
举一反三：
[单选题]After a fire has been extinguished in a closed space, personnel may safely enter the space when
A. smoke density has been decreased sufficiently to see the bulkhead opposite the compartment's entrance
B. a lifeline and explosion proof flash light are used
C. all smoke and toxic fumes are removed and an adequate oxygen supply is present
D. overhaul has been completed to remove any possible source of re-ignition
[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?
A. 艇着水后
B. 艇脱钧后
C. 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？
A. 硬钢丝绳
B. 软钢丝绳
C. 半软钢丝绳
D. 以上都不是
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