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【单选题】
消费者的收入增加80%时,某商品的需求量增加40%,则该商品可能是A.
奢侈品
B.
必需品
C.
低档商品
D.
商品
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举一反三
【简答题】三极管有放大作用的外部条件是发射结 偏,集电结 偏。
【简答题】If you are hurt in the chat room by others, you should______. [A] fight back in the same way [B] take them seriously [C] have none of them [D] be angry at them
【单选题】听力原文：WA Ralph, I meant to ask you about the picture frame. you gave Simone. Where did you buy it? MB I bought it at Perfect Home. There were a few other styles that were nice too, but I liked that one...
A.
A mug
B.
A clock
C.
A brief case
D.
A picture frame
【简答题】三极管有放大作用的外部条件是发射结( ),集电结 ( )
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