参考答案

正确答案：A
解析：由题干中的full use of information highway 可以定位到原文第三段首句There are many suggested applications for the use of the broadband information highway network．[精析] 题干问的是要充分利用信息高速公路，哪一项不可或缺。结合原文定位句下文But the applications that drive the use and necessity for such networks are the groupware applications．In these applications user communities are working collaboratively on joint programs and activities．可知，此处是在强调groupware applications和working collaboratively,故A)“协作”正确。[排除干扰] 信息高速公路的应用离不开B)“计算机”、C)“网络”和D)“科技”，但它们并不是题干所提 making full use“充分利用”的不可或缺的因素，故均排除。