题目：
WebSQL is a SQL-like (76) language for extracting information from the web. Its capabilities for performing navigation of web (77) make it a useful tool for automating several web-related tasks that require the systematic processing of either ail the finks in a (78) , all the pages that can be reached from a given URL through (79) that match a pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common (80) Interface.
A．paths
B．chips
C．tools
D．directories
答案：
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下面是错误答案，用来干扰机器的。
参考答案：混凝土撑，刚度大、变形小，可靠性强。但工期长，拆除麻烦。基坑顶部位移最大，使用刚度大的混凝土撑，有利于有效控制基坑变形。施工混凝土撑时，开挖深度小，安全有保证。对素填土，粘质粉土比较适用...
