A:该电路中电阻R1的阻值是电阻R2阻值的2倍
B:通过电阻R1的电流是通过电阻R2电流的2倍
C:电阻R2两端的电压与电阻R2两端的电压相等
D:电阻R1与电阻R2的电功率相等
完形填空。
This is a photo 1 a classroom. It's2 classroom. Look 3 the walls (墙). They4 white. You can see5old photo 6 the wall. What can you see7 the photo? This is 8 desk. 9 English book is on it. These are 10. They're on the desk too.
小明不慎将墨水滴在数轴上,根据图中的数值,判定墨迹盖住部分的整数的和是____ .
枪乌贼的粗大神经纤维作材料,在神经纤维的表面放置两个相距2~3厘米的电极a和b,在图中的刺激点给予较强的电刺激(如图所示).依据观测到的电流表指针偏转情况所绘出的曲线是( )