问题 单项选择题

电源电动势的表达式为:E=A/q,其中A表示()

A、电源电动势

B、电源力所做的功

C、单位正电荷的电荷量

D、单位负电荷的电荷量

答案

参考答案:B

填空题

指出下列句中引号的作用,并根据第1句和第3句中引号的用法各写一种话。   

1.罪恶的子弹还威胁着娇嫩的“和平之花”。 

                                                                                                                             

2.说他“特别”,因为他爱鱼到了忘我的境界。          

                                                                                                                             

3.他在学校念书的时候,同学们就称他为“辩论家”。      

                                                                                                                            

4.黄河是中 * * 的“摇篮”。

                                                                                                                           

写话:5.                                                                                                            

          6.                                                                                                              

单项选择题