在应用过程中发现，若对回归模型增加一个解释变量，多重判定系数R2一般会（）。

单项选择题实验法相对于其他方法可以在哪种研究中得到比较可靠的结论？（）

多项选择题WebSQL is a SQL-like ___(71)___ language for extracting information from the weB.Its capabilities for performing navigation of web ___(72)___ make it a useful tool for automating several web-related tasks that require the systematic processing of either all the links in a ___(73)___ , all the pages that can be reached from a given URL through ___(74)___ that match a pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common ___(75)___ InterfacE.(71)A.query B.transaction C.communication D.programming(72)A.browsers B.servers C.hypertexts D.clients(73)A.hypertext B.page C.protocol D.operation(74)A.paths B.chips C.tools D.directories(75)A.Router B.Device C.Computer D.Gateway