如圖所示是電場(chǎng)中某區(qū)域的電場(chǎng)線分布,a、b是電場(chǎng)中的兩點(diǎn),則(           )                               

                                                                                                   

    A.  電荷在a點(diǎn)受到電場(chǎng)力方向必定與場(chǎng)強(qiáng)方向一致

    B.  同一點(diǎn)電荷放在a點(diǎn)受到的電場(chǎng)力比放在b點(diǎn)時(shí)受到電場(chǎng)力小

    C.  正電荷放在a點(diǎn)靜止釋放,在電場(chǎng)力作用下運(yùn)動(dòng)的軌跡與電場(chǎng)線一致

    D.  a點(diǎn)的電場(chǎng)強(qiáng)度較大

                                                                                                                                     

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