根據(jù)波特教授對(duì)競(jìng)爭(zhēng)對(duì)手的分析模型,對(duì)競(jìng)爭(zhēng)對(duì)手的分析有哪幾項(xiàng)要素?() I.競(jìng)爭(zhēng)對(duì)手的未來目標(biāo) II.競(jìng)爭(zhēng)對(duì)手的自我假設(shè) III.競(jìng)爭(zhēng)對(duì)手的現(xiàn)行戰(zhàn)略 IV.競(jìng)爭(zhēng)對(duì)手的能力 V.競(jìng)爭(zhēng)對(duì)手的市場(chǎng)信號(hào)