刮板除渣机倾斜输送时，输送倾角不大于（）。

A、50°

B、45°

C、40°

D、30°

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．hypertext

B．page

C．protocol

D．operation