单项选择题

扩压器的作用是让气流平稳流动。（） A. 对 B. 错

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单项选择题

Which of the following would be data rather than information?

A．Sales increase/decrease per product in last quarter
B．Total sales value per product
C．Sales made per salesman as a percentage of total sales
D．Sales staff commission as a percentage of total sales

单项选择题

“今有女善织,日益功疾。初日织五尺，今一月，日织九匹三丈。问日益几何。”这是求___________的问题。
A、首项 B、公差 C、公比 D、通项
A、首项
B、公差
C、公比
D、通项