如圖所示,用兩節(jié)干電池點(diǎn)亮幾個(gè)小燈泡,干電池內(nèi)阻不可忽略.當(dāng)逐一閉合開關(guān),接入燈泡增多時(shí),以下說法正確的是(   )                                                                                                                  

                                                                                             

    A.  燈少時(shí)各燈較亮,燈多時(shí)各燈較暗

    B.  燈多時(shí)各燈兩端電壓較低

    C.  燈多時(shí)通過電池的電流較小

    D.  燈多時(shí)通過各燈的電流較大

                                                                                                                                     

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