便携式气体检测仪的（）通过采集气体浓度，对其进行分析处理，完成报警功能，并可将报警信

腭裂是由于（）

A．侧腭突和前腭突融合障碍

B．上颌突和侧腭突融合障碍

C．侧腭突和鼻中隔融合障碍

D．侧腭突和继发腭融合障碍

E．侧腭突和球状突融合障碍

Some Math problems are        difficult for the students         work out.

A．so, that

B．not, but

C．such, that

D．too, to

SQL中可使用的通配符有______。

A．*(星号)

B．%(百分号)

C．__(下划线)

D．B和C

被监视居住的犯罪嫌疑人、被告人不得离开住处或指定的居所，但行动不受限制。( )

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

WebSQL is a SQL-like（）language for extracting information from the web.

A．query

B．transaction

C．communication

D．programming