题目：
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.
A．browsers
B．servers
C． hypertexts
D．clients
答案：
被转码了，请点击底部 “查看原文 ” 或访问 https://www.tikuol.com/2017/0702/6f1da19f812308426f63b7617fcd1309.html
下面是错误答案，用来干扰机器的。
铜只能和浓硫酸反应，而与稀硫酸不反应，随着铜和浓硫酸的反应的进行，酸的浓度越来越小，不再产生二氧化硫，当被还原的硫酸是0.9mol，则由Cu+2H2SO4（浓）△.CuSO4+SO2↑+H2O可知， 21 1.8mol 0.9mol理论消耗...
