各分、省公司负责()及上报工程建设前期及准备工作费用计划建议。
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Why is gas-freeing rarely required for LPG cargo tanks? ()
A. LPG is compatible with all cargos
B. LPG's high oxygen content makes it nonvolatile
Cargo tanks are inspected less frequently than on oil tankers
D. The cargo tanks are used for one type of cargo only
为了保证防坠落辅助设备安全使用不应做到专人负责。
A. 正确
B. 错误