输液速度宜慢的药物是()。 A．10%氯化钾 B．甘露醇 C．高渗盐水 D．多巴胺

依次填入下面一段文字横线处的语句，衔接最恰当的一组是[ ]

　　当漫天飞舞起那轻盈的雪花时，你看吧，________，________；________。________，________。________，我便心旷神怡，因为我喜欢这洁白晶莹的雪花。

①大地万物欣喜地伸开臂膀

②天地之间出现了一片雪花的海洋

③接受着这上天给予的无私的恩赐

④犹如节日里的素色礼花，装点着这偌大的空间

⑤每每此时，望着这即将被乔装改扮的世界

⑥又如天女散花，不紧不慢，均匀有致地撒落下来

A．①③②⑤④⑥

B．⑤①③②④⑥

C．②④⑥①③⑤

D．⑤②④⑥①③

提出原子学说奠定近代化学基础的科学家是（　　）

A．道尔顿

B．阿佛加德罗

C．拉瓦锡

D．普利斯特里

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (36) of the technical requirements for the software product.
During the requirements definition phase, the requirements definition team uses an interative 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 (37) that it must meet. The starting point is usually a set of high level requirements from the (38) that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for ’the system and then defines (39) 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 (40) 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

汽车用的主要底板防护材料根据其对汽车行驶过程中的影响可分为（）。

A.高密度

B.低密度

C.高黏度

D.低黏度

企业要以工程造价来控制成本，工程造价提供的信息资料可以作为控制成本的依据。( )