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问题 单项选择题

房地产市场调查方法中，( )是指将调查范围缩小到一个比较小的规模上，进行试验后得出一定结果，然后再推断出样本总体可能的结果的调查方法。

A．实验法

B．访问法

C．典型调查法

D．观察法

答案

参考答案：A

单项选择题

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (16) of the technical requirements for the software product.
During the requirements definition phase, the requirements definition team uses an iterative process to expand a broad statement of the system requirements into a complete and detailed specification of each function that the software must perform and each _( 17) that it must meet. The starting point is usually a set of high level requirements from the (18) that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for the system and then defines (19) showing how the system will be operated publishes the system and operations concept document and conducts a system concept review (SCR).
Following the SCR, the team derives (20) requirements for the system from the high level requirements and the system and operations concept. Using structured or object-oriented analysis, the team specifies the software functions and algorithms needed to satisfy each detailed requirement.

A．criterion

B．standard

C．model

D．system
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单项选择题

硫柳汞用于生物制品防腐的浓度为（）。

A、0.01%

B、0.1%

C、1%

D、2%
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