有人用图1-3所示的电路来测量电源电动势和内阻，测量的结果是（　　）<br /> <img src="http://www.weimei168.com/uploads/202208/20120926172764086408.jpg" alt="" /><br /> <img src="http://www.weimei168.com/uploads/202208/20120926172762446244.jpg" alt="" /><br /> <img src="http://www.weimei168.com/uploads/202208/20120926172745764576.jpg" alt="" /><br /> <img src="http://www.weimei168.com/uploads/202208/20120926172765036503.jpg" alt="" /><br /> <br /> <img src="http://www.weimei168.com/uploads/202208/20120926172794269426.jpg" alt="" />