将下列大洲与其地理事物对应用直线连在一起。地形特点大洲 _爱下问搜题

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问题连线题

将下列大洲与其地理事物对应用直线连在一起。

地形特点	大洲	气候特点
A 西部高大山脉，东部
平原与高原相间分布	①亚洲	a 气候复杂多样，以大陆性
气候和亚寒带气候为主
B 地势中部高四周低，
以高原、山地为主	②非洲	b 气候普遍暖热，
称为“热带大陆”
C 地势东南高西北低，
高原面积广大	③北美洲	c 热带范围广阔，热带雨林、
草原气候分布最广
D西部高大山脉，中部广

阔平原，东部低缓高地④南美洲d 气候复杂多样，

大陆性气候显著

答案

B——①——d C——②——b D——③——a A——④——c

单项选择题

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

单项选择题

限制锅炉水中的含盐量和含硅量是为了保证（）品质。

A、蒸汽

B、炉水