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问题 判断题

当价格是影响需求的主要因素时，就出现了基于成本的竞争。

答案

参考答案：对

单项选择题

Questions 24-30


·Look at the questions for this part.
·You will hear a passage about "Odds and Ends ".
·For questions 24-30, indicate which of the alterative A, B, or C is the most appropriate response.
·Mark one letter A, B or C on the Answer Sheet.

Which one do you think is right

A．Scientists have made great successes because they have odds and ends used well.

B．Scientists use all their time to get success.

C．Scientists know how to take advantage of time so they achieve success.
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单项选择题

对压强为P，温度为T，体积为V的理想气体，若一个分子的质量为m，该理想气体的分子数为（）。（其中：K为波尔兹曼常数，R为摩尔气体常量）

A.PV/m

B. PV/(KT)

C.PV/(RT)

D.PV/(mT)
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