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问题 选择题

如图，六边形ABCDEF是轴对称图形，CF所在的直线是它的对称轴，若∠AFC+∠BCF=150°，则∠AFE+∠BCD的大小是

[ ]

A．150°

B．300°

C．210°

D．330°

答案

答案：B

单项选择题

OOP languages that create objects, such as (1) and (2) are beginning to take hold as viable tools for programmers. To effectively reuse objects, programmers need a place to store them such as an ODBMS or a RDBMS with object oriented extensions.
Databases that handle object data not only let user store and retrieve (3) data, but also let them store objects created by OOP languages, to facilitate rapid software development and reuse, and let them (4) new multimedia applications combining multiple data types.
RDBMS vendors have developed new extensions to existing DB technology to accommodate the most common forms of (5) data.

A．numeric

B．FORTRAN

C．build

D．unstructured
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单项选择题

按照马克思主义的观点，阶级划分是一种（）。

A、经济分层

B、政治分层

C、社会资源分层

D、职业分层
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