如图甲为小明同学探究“通过导体的电流与电压的关系”时的实物图。已知电源电压和电阻R1的阻值均恒定，电流表A的量程为0～0．6安，电压表V1的量程为0～3伏，电压表V2的量程为0～15伏，滑动变阻器R2_刷题宝

题干

如图甲为小明同学探究“通过导体的电流与电压的关系”时的实物图。已知电源电压和电阻R₁的阻值均恒定，电流表A的量程为0～0．6安，电压表V₁的量程为0～3伏，电压表V₂的量程为0～15伏，滑动变阻器R₂上标有“50Ω 1A”的字样。

上一题下一题 0.0难度选择题更新时间:2018-12-01 07:38:20

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同类题1

美国历史上著名的总统林肯多次经历挫折之后最终获得成功的事例，给我们的启示是（）

①以正确的态度对待挫折 ②勇敢地面对并战胜挫折

③只要挫折多，就能成功 ④艰难困苦，玉汝于成

同类题2

下列关于生物工程中酶的作用的说法中不正确的是(　　)

同类题3

158 毫升＝____厘米³＝____升＝____米³

同类题4

下列说法正确的是(　　)
①向量

是平行向量，则A、B、C、D四点一定不在同一直线上
②向量a与b平行，且|a|＝|b|≠0，则a＋b＝0或a－b＝0
③向量

的长度与向量

的长度相等
④单位向量都相等

同类题5

选择合适的词填空。

doesn't chores make feed will going wash set homework trash

Jack has to do some ____ at home this week, because his mom is ____ on a trip to Beijing. Every morning he has to ____his bed but he ____ have to make dinner. He doesn't have to take out the ____, because his father ____ do that. In the evening, Jack has to ____ the table and then ____ the dishes. He doesn't have to ____ his fish but he has to do his ____!

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