A.同邊網(wǎng)絡(luò)效應(yīng)強(qiáng),跨邊網(wǎng)絡(luò)效應(yīng)弱 B.同邊網(wǎng)絡(luò)效應(yīng)弱,跨邊網(wǎng)絡(luò)效應(yīng)強(qiáng) C.同邊網(wǎng)絡(luò)效應(yīng)和跨邊網(wǎng)絡(luò)效應(yīng)都弱 D.同邊網(wǎng)絡(luò)效應(yīng)和跨邊網(wǎng)絡(luò)效應(yīng)都強(qiáng)