When you decide to start a family，you make a(n) ________ to them.You don't turn your back on the peo

题干

When you decide to start a family，you make a(n) ________ to them.You don't turn your back on the people who love you. （）

A：contribution

B：commitment

C：devotion

D：effort

上一题下一题 0.0难度选择题更新时间:2017-02-07 04:25:47

一位同学用如图所示的电路探究“电流与电阻的关系”．电源电压不变，下表是实验数据，若第四次实验时将定值电阻的阻值由30Ω调为40Ω后就直接读出电流表的示数，这个示数应该是（　　）

R/Ω	10	20	30	40	50
I/A	0.6	0.3	0.2		0.12