辨析：人民代表大会是我国国家权力机关，政府由人民代表大会产生并对其负责，政府的权力属于人民代表大会。
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知：
，则b、c处在同一个等势面上，根据电场线与等势面垂直知，场强沿ac方向垂直指向bc
．
和
得