题干

如图所示,a、b是两电阻R1和R2的I﹣U图象,它们把第一象限分成Ⅰ、Ⅱ、Ⅲ、三个区域,若将R1和R2并联,则并联后的总电阻的I﹣U图象(   )

A:一定在区域Ⅰ

B:一定在区域Ⅱ

C:一定在区域Ⅲ

D:不能确定

上一题 下一题 0.0难度 选择题 更新时间:2019-12-23 08:39:10

答案(点此获取答案解析)

C

同类题4

阅读理解

    Women make better drivers than men for many reasons. Why is that? If you ask me, I'd like to say, men know that women are better drivers but do not have the courage to admit the truth—women are queens of the road.

    Unlike men, women stop for directions when they have no idea as to where they are going. We don't drive around for hours pointlessly wasting a tank of gas only to find ourselves heading in the wrong direction. Have you ever been in a car with a man who is lost? He tells you to shut up when you begin to open your mouth. And every five minutes or so he takes a turn going forty-five miles per hour only to find out he's made another wrong turn.

    Speeding is what men do best on the road. There is a reason why men get more speeding tickets than women. Not because we trick to get out of tickets but only because we don't get pulled over as frequently. We don't speed. We have more intelligence than senselessly to put our own lives as well as the lives of others in danger.

    My largest issue with male drivers is how a majority of them drive with one hand on the wheel and the other hand doing only God knows what. The seat is backed as far as possible, and they're totally lost into loud music beyond a necessary level. You don't ever see women driving like that.

    I feel that the above evidence more than proves my points that women are not only better drivers but also safer drivers than men. We women rule the road. Oh, and men, if you want to continue criticizing(批评)women for being bad drivers, bring it on.