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Top the derrick, please.（）
- A、请摆动吊杆
- B、请放低吊杆
- C、请调高吊杆
- D、请移动吊杆
参考答案
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单选题Top the derrick, please.（）A
请摆动吊杆B
请放低吊杆C
请调高吊杆D
请移动吊杆
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