A.3 B.4 C.5 D.6
A.局域網(wǎng) B.校園網(wǎng) C.廣域網(wǎng) D.辦公網(wǎng)
A.網(wǎng)上營(yíng)銷和離線營(yíng)銷 B.網(wǎng)上營(yíng)銷和在線營(yíng)銷 C.網(wǎng)下?tīng)I(yíng)銷和在線營(yíng)銷 D.在線營(yíng)銷和離線營(yíng)銷