地层岩石电阻率是确定油气层的关键参数，测井用的地层岩石电阻率依赖于（）。 A.地层水

下图分别是蓝藻和衣藻的结构模式图。请据图回答：

(1)两者虽然在结构上都具有___________、___________、__________等，但是衣藻属于真核生物，因为：________________________。

(2)藻类有好多种，蓝球藻、团藻、颤藻、念珠藻中，不属于蓝藻的是___________。

(3)蓝藻细胞中含有________和_______两种色素，也能够进行光合作用，属于________(自养或异养)生物。

差温式火警探测器是在（）情况下给出火警信号。

A．温度差大于给定值

B．烟气浓度大于给定值

C．温度变化量大于给定值

D．烟气浓度变化量大于给定值

The purpose of the requirements definition phase is to produce a clear, complete, consistent, and testable (71) 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 (72) that it must meet. The starting point is usually a set of high-level requirements from the (73) that describe the project or problem.
In either case, the requirements definition team formulates an overall concept for the system and the defines (74) showing how the system will be operated, publishes the system and operation concept documents, and conducts a system concept review (SCR) .
Following the SCR, the team derives (75) requirements for the system from the highlevel requirements and the system operations concept. Using structured or object-oriented analysis, the temn specifies the software functions and algorithms needed to satisfy each detailed requirements.

A．function

B．definition

C．specification

D．statement

中度烧伤是( )

A．总面积在3l%～50%

B．II度烧伤面积在11%～30%

C．小儿Ⅲ度烧伤面积在5%～10%

D．II度烧伤面积在10%以下

E．III度烧伤面积在11%～20%

土壤容许承载力可用土壤安息角（±n°）表示，其中“+”表示（），“－”表示（），“°”表示（）。（）

A.挖方、填方、安息角

B.填方、挖方、安息角