重吊杆用于吊大的重件。（）
- A、Heavy derrick is used for lifting large heavy cargo.
- B、Derrick is used for lifting large heavy cargo.
- C、Heavy derrick is used for lifting dry bulk cargo.
- D、Derrick is used for lifting dry bulk cargo.
正确答案:A
答案解析:有
微信扫一扫手机做题
多做题，通过考试没问题！
船舶水手考试