下列中哪种情形构成民事法律关系( )。

A．王某邀请李某前往体育馆溜冰，李某不慎摔伤

B．张三与李四约定前往青岛旅游，李四爽约未去，张三不得不取消行程安排

C．县政府为建办公大楼，向银行贷款了1000万元人民币

D．陈某对汪某说：“只要你能通过法律顾问执业资格考试，我就做你女朋友。”

 WebSQL is a SQL-like (1)language for extracting information from the web. Its capabilities for performing navigation of web (2)make it a useful tool for automating several web-related tasks that require the systematic processing of either all the links in a(3),all the pages that can be reached from a given URL through (4)that match a pattern,or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common (5)Interface.

空白（5）处应选择（）

A.Router

B.Device

C.Computer

D.Gateway