单项选择题电子商务数据采集与处理方案中不包含（ ）。 A、背景介绍 B、分析目标 C、数据来源渠道 D、数据指标数据内容
单项选择题I _____ it difficult to make myself understood. Partly because my spoken English has accents and partly because what I said involves too many technical terms.A.accuseB.findC.imagineD.predict
