照查表示灯亮灯表示临站办理反向或侧向进路，灭灯表示正常情况。
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Which bills aren’t required endorsement when transferred in the following items？下列哪些票据在转让时不需要背书？（）
A Bill of Exchange is payable to Mary or bearer
B. A Bill of Exchange is payable to bearer
C. A Bill of Exchange is payable to Mary
D. A Bill of Exchange is payable to Mary only
E. A Bill of Exchange is payable to the order of Mary
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