WebSQL is a SQL-like (26) language for extracting information from the web. Its capabilities for performing navigation of web (27) make it a useful tool for automating several web-related tasks that require the systematic processing of either ail the links in a (28) , all the pages that can be reached from a given URL through (29) that match a’ pattern, or a combination of both. WebSQL also provides transparent access to index servers that can be queried via the Common (30) Interface.

（26）是（）

A.query

B.transaction

C.communication

D.programming

1H～MRS的工作原理是依据（）

A．不同位的水分子的相位变化不同完成的 

B．不同分子结构中的质子的进动频率不同完成的 

C．不同组织结构的相位干扰不一样完成的 

D．不同相位的信号填充不同的K空间 

E．不同代谢产物的相位不同，在K空间的位置不同完成的