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【判断题】
双重边际效应是指供应链上、下游企业为了谋求各自收益最大化,在独立决策的过程中确定的产品价格低于其生产边际成本的现象。A.
正确
B.
错误
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举一反三
【单选题】二极管加反偏电压的特性是( )。
A.
（ A）反向电阻小、反向电流小
B.
（ B）反向电阻小、反向电流大
C.
（ C）反向电阻大、反向电流小
D.
（ D）反向电阻大、反向电流大
【简答题】??B We walked in 80 quietly that the nurse at the desk didn&39;t even lift her eves from the book. Mum pointed at a big chair by the door and I knew she wanted to sit down．While l watched mouth open i...
【单选题】听力原文： I had spent my last day in London visiting friends, taking pictures, and doing some last-minute shopping. Among other things, I had bought some presents: a shirt for my brother, a woollen blanke...
A.
A shirt.
B.
An alarm clock.
C.
A woolen blanket.
D.
A suitcase.
【简答题】From my father I have learned a lot. And I’m very thankful to him, I remember when I was a child my father always got up very early, quickly putting on his clothes and going off to work. To arrive in ...
【单选题】We walked in so quietly that the nurse at the desk didn't even lift her eyes from the book. Mum pointed, at a big chair by the door and I knew she wanted me to sit down. While I watched, mouth open in...
A.
to clean the floor
B.
to please the nurse
C.
to see a patient
D.
to surprise the story-teller
【多选题】关于坏疽的叙述下列哪些是正确的
A.
可伴有全身中毒症状
B.
感染的腐败菌都是厌氧菌
C.
较大范围的坏死继发腐败菌感染
D.
坏疽组织多呈黑色或污秽
E.
病变部位主要为四肢和与外界相通的内脏
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