如图是甲、乙两导体的电流与电压的关系图象,由图可知甲的电阻是____Ω.若将甲和乙并联接在电路中,通过它们的电流之比I甲:I乙=____.
— Smart phones are more and more popular now.
— So they are. But they still ________ too much.
对于通电螺线管极性的标注,如图中正确的是( )