[原题]ab是长为l的带电细杆,P1、P2是位于ab所在直线上的两点,位置如图1所示.ab上电荷产生的静电场在P1处的场强大小为E1,在P2处的场强大小为E2.则以下说法正确的是(A)两处的电场方向相同,E1E2.(B)两处的电场方向相反,E1E2.(C)两处的电场方向相同,E1E2.(D)两处的电场方向相 [original] ab is a thin rod with length l, and P1 and P2 are two points on the straight line of ab. The position is shown in Figure 1. The electrostatic field generated by charge on ab is the magnitude of field strength at P1. The field strength at P2 is E2. Then the following statement is correct: (A) The electric fields in the two directions are the same, E1E2. (B) The electric fields in two directions are opposite, E1E2. (C) The electric fields in the two directions are the same. , E1E2. (D) Two directions of the electric field