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问题 单项选择题

考虑目标的可靠性和发挥项目参与者的潜能，必须适当留足空间和提高或降低难度而设定各个目标值，这是项目目标设计原则中的（）。

A.量化性原则

B.裕度性原则

C.可溯性原则

D.适宜性原则

答案

参考答案：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．structured

C．build

D．build
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单项选择题

全塑电缆的一次参数共有（）项。

A、2

B、3

C、4

D、6
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