价值工程的目的是以研究对象的()，以获取最佳的综合效益。
A、最低的寿命周期成本D
暂无解析
________they'vegottoknoweachotheralittlebetter,theygetalongjustfine.
Ifound________toanswerallthequestionswithinthetimegiven.
Aftersomanydayswithoutrain,thegroundquickly________thelittlerainthatfelllastnight.
It'smore________tobuyaseasonticketifyoutraveleveryday.
设数列收敛，则（）
