接送料的工作平台应和切刀上部保持水平，工作台的长度应根据待加工材料长度设置。
参考答案：错
One day Chuck is _______a flight _____the Pacific Ocean ______suddenly his plane crashes.[ ]
A. in, over, while
B. on, across, when
C. with, through, when
D. on, across, while
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