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问题 选择题

在图所示的电路中，电源电压和灯泡电阻都保持不变，当滑动变阻器R的滑片P由中点向右移动时，下列判断中正确的是(  　　)

A．电流表和电压表的示数都增大　

B．电流表和电压表的示数都减小

C．电流表的示数减小，电压表的示数增大

D．电流表的示数减小，电压表的示数不变

答案

答案：D

灯和滑动变阻器并联，电流表测滑动变阻器这条支路的电流，电压表测电源电压(不变)。滑动变阻器R的滑片P由中点向右移动时，有效阻值增大，电流减小，即电流表示数减小，选D

单项选择题

判断甲亢病情程度和治疗结果的重要标志是（）。

A.基础代谢率

B.脉搏及脉压变化

C.食欲变化

D.甲状腺大小变化

E.体重变化
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单项选择题

An analyst receives a research report from a colleague. The colleague’s report has an elaborate table with performance data on publicly traded stocks. The colleague says the data in the table consists of measures provided by Standard & Poor’s. The analyst finds the table a useful reference for a report she is writing. She uses several pieces of data from the table. The analyst is potentially in violation of:（）

A. no particular standard because this is appropriate activity.

B. Standard Ⅱ concerning the obligations to the capital markets.

C. Standard Ⅴ (A) if she does not first verify the data in the table is accurate.
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