A.網(wǎng)上自助開(kāi)戶開(kāi)展網(wǎng)上交易 B.券商自建網(wǎng)站開(kāi)展網(wǎng)上交易 C.與IT技術(shù)商合作開(kāi)展網(wǎng)上交易 D.基于證券服務(wù)部開(kāi)展網(wǎng)上交易