投资决策过程的核心环节是（ ）。
Refer to the exhibit. EIGRP has been configured on routers R1 and R2. However， R1 does notshow R2 as a neighbor and does not accept routing updates from R2. What could be the cause ofthe problem？（） ["The no auto-summary command has not been issued under the EIGRP process on bothrouters","Interface E0 on router R1 has not been configured with a secondary IP address of 10.1.2.1\/24","EIGRP cannot exchange routing updates with a neighbor’s router interface that is configuredwith two IP addresses","EIGRP cannot form neighbor relationship and exchange routing updates with a secondaryaddre"]
邓小平在我党一贯倡导的“实事求是”前面加上一个“解放思想”，其理论意义在于（）。 ["冲破“两个凡是”的束缚","实现党的工作重心的转移","探索建设有中国特色社会主义的道路","强调解放思想是实事求是的前提"]
当吊钩处于工作位置最低点时，缠绕在卷筒上的钢丝绳尾外，还必须有不少于（）圈的安全圈。 ["1","2","3"]
下列单元格说法中有错误的是（） ["输入公式时，要选定计算结果放置的单元格，输入结束回车后，计算结果会代替公式在单元格中填充。","如果列可变，而行不能变，则表达式写成B$3。","如果行可变，列不变，则表达式写成$B3。","B3为绝对单元格表示。"]
根据首句平仄推演五律、七律平仄式的原则是什么？
