题目

 有两个电路元件A、B，把它们串联在电路中，如图（乙）所示，流过元件的电流与其两端的电压关系如图（甲）所示。闭合开关S，这时电流表的示数为0.4A，则A、B两元件的电功率之比为 A. 4:5       B. 5:4      C. 2:3       D. 1:3 答案：A The April 10, 2010 air crash, with a Russian Tu-145 plane       Poland’s president Lech Kaczinsky, his wife and many Polish government and military officials, shocked the whole world. A. carried         B. being carried     C. carrying               D. to carry