题目内容

Sophia Stella, a 1_______ at Columbia’s School of Engineering, is one of many undergraduates who become involved, one way or another, in research 2_________ at the university. Some do it for academic 3_________, some for money, some just for experience. Students and professors agree that an undergraduate research 4_______ can be uniquely 5__________ to both parties.

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总效用达到最大值时,边际效用为()

A. 小于0
B. 等于0
C. 大于0

基数效用论用来分析消费者行为的工具是。

基数效用论认为效用不可以计量。

A. 对
B. 错

WCDMA属于第四代移动通信网络技术。

A. 对
B. 错

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