数据的逻辑结构有线性结构和______两大类。
参考答案：非线性结构
解析： 数据的逻辑结构有线性结构和非线性结构两大类。
We can't blame John for the mistake. He wasn't here when we decided what to do, so he ___ about the
plan.[ ]
A. wasn't know
B. was known
C. can't be known
D. couldn't have known
按项目的( )分类，可将项目划分为政府投资项目和非政府投资项目。
A．企业规模
B．建设性质
C．投资来源
D．市场需求
