题目

如图是电阻A和B的I--U图像。若把二者并联后接入电路中，当通过电阻B的电流是0.3A时，通过电阻A电流是A。若把二者串联后接入某电源两端，当通过电阻的电流为0.2A,该电源的电压是V. 答案：【1】0.6【2】3.0Cindy’s parents encouraged her ________ to dance when she was very young.A. learn B. learnedC. to learn D. learning