简述克里斯提尼改革。
结构化分析方法的核心思想是（）、（）、逐步求精。
预制外挂墙板安装尺寸，斜撑杆位置允许偏差为（）。 ["A.±7mm ","B.±8mm ","C.±9mm ","D.±10mm"]
What is true about access control on bridged and routed VLAN traffic？（） ["Router ACLs can be applied to the input and output directions of a VLAN interface","Bridged ACLs can be applied to the input and output directions of a VLAN interface","Only router ACLs can be applied to a VLAN interface","VLAN maps and router ACLs can be used in combination","VLAN maps can be applied to a VLAN interfac"]
鉴于电动机和电阻器在制造上存在着容差以及每台电动机使用的连接导线长短不同等因素，也会导致电动机的机械特性不一致。为了保证每台电动机都具有相同的机械特性，可采用调整电阻箱中长期接入（）的办法来解决。 ["转子的电阻值","定子的电阻值","线圈的电阻值","导线的电阻值"]
思维障碍
