云计算的实质是计算虚拟化、存储虚拟化、网络虚拟化的结合，继而实现数据更新的（）过程。
A.结构化
B.虚拟化
C.实质化
D.统一化
参考答案：A
根据对话的语境和首字母提示，补全对话，使对话内容完整
A:You said your brother was coming. Didn't you go and m____1___him?
B:I did. But he was not here. He m____2____have missed the train. That means he's got to stay out and wait t____3____tomorrow.
A:How awful! But take it easy. He will surely make it. He's a s___4___guy,isn't he?
根据国务院《信访条例》，（）以上人民政府应当设立信访工作机构。
A、乡、镇级
B、县级
C、市级
D、省级
