网站分析中,推广效果核心制约要素,营销3R指的什么?()
A.reach曝光度
B.attraction吸引力
C.relevance相关性
参考答案:A, B, C
He came to my lecture every week, but his look ___ that he was not really interested.
A.expresses
B.described
C.explained
D.suggested
软件工程的瀑布模型,刻画了软件生命周期的各个阶段划分,一般认为各阶段中工作难度较大的通常是
A.可行性分析
B.需求分析
C.系统设计
D.编码