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导致“温室效应”的主要原因是什么？缓解“温室效应”的措施是什么？

答案

参考答案：原因是：①化石燃料的燃烧排放大量二氧化碳②森林被砍伐，绿色植被被破坏

措施是：①多植树造林②减少化石燃料燃烧，开发利用新能源。

问答题 简答题

委托转供电应遵守哪些规定？
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单项选择题

Traditional structured analysis techniques focus upon the flow of (71) within a system. Object - oriented analysis emphasizes the building of real - world models. It examines requirements from the perspective of the classes and objects found in the vocabulary of the (72) domain.

Traditional system design method emphasizes the proper and effective structure of a complex system. Object -oriented design method encompasses the process of object -oriented decomposition and a (73) for depicting both logical and physical as well as static and dynamic models of the system under design.

Object - oriented programming is a method of implementation in which programs are organized as cooperative collections of objects, each of which represents an (74) of some class, and whose classes are all members of a hierarchy of classes united via (75) relationships.

73（）

A．mark

B．picture

C．symbol

D．notation
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