单项选择题

1.单限电压比较器其实是让集成运放工作在（）状态。
A、正反馈
B、负反馈
C、开环状态
D、线性工作区

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单项选择题

股利增长率又称为（）。
A、股利收益率
B、资本利得收益率
C、到期收益率
D、总利率

单项选择题

What aren’t belong to the process of development in Lumium?

A．Research, Ideation and Industrial Design
B．Mechanical Engineering, Embedded Engineering and Prototype
C．System Upgrade and Software maintenance
D．Manufacturing Support, Products Testing, Product Packaging Design and Product Animation