A:水滴石穿 绳锯木断
B:城门失火 殃及池鱼
C:近朱者赤 近墨者黑
D:由此及彼 由表及里
甲、乙两同学在同一地点沿平直路面同向步行,他们运动的路程随时间变化的规律如图所示,下面说法中正确的是( )
小电珠的伏安特性曲线如图所示(只画出了AB段),由图可知当小电珠两端电压由3V变为6V时,其灯丝电阻改变了____Ω.
European football is played in about 80 countries, ____ (make) it the most popular sport in the world.