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【多选题】
随库存量增加而减少的成本是( )A.
订货成本
B.
机会成本
C.
储存成本
D.
缺货成本
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】I_____ violin lessons every two weeks, but I think I'll make it every week from next month. [ ]
A.
am having
B.
have had
C.
have
D.
have been having
【单选题】If I were in ______ position of the headmaster, I would make every effort to bring ______ end to cheating in exams.
A.
/; the
B.
a; the
C.
a ; an
D.
the; an
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