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关于抽象（Abstraction)，下列说法正确的是（)。A.抽象是一种重要的思维方法。B.抽象就是把那些空

关于抽象(Abstraction)，下列说法正确的是()。

A.抽象是一种重要的思维方法。

B.抽象就是把那些空洞不易捉摸的事物，描述成具体的事物。

C.抽象是对本质特征的抽象，本质特征是确定的，因此抽象是唯一的。

D.抽象是产生概念，认识万千世界的工具，对事物进行抽象具有特定的模式。

E抽象是从众多的事物中抽取出共同的、本质性的特征，而舍弃其非本质的特征。

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发布时间：2020-09-27

更多“关于抽象（Abstraction)，下列说法正确的是（)。A.抽象是一种重要的思维方法。B.抽象就是把那些空”相关的问题

第1题

下列关于抽象类和抽象方法描述错误的是（）

A.抽象类和抽象方法必须通过abstract修饰

B.抽象类不能实例化

C.抽象方法只有方法声明，没有方法实现

D.抽象方法可以通过构造方法实例化

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第2题

4·下列关于实体描述正确的是（）

A.实体是客观存在并相互区别的事物

B.不能用于表示抽象的事物

C.既可以表示具体的事物，也可以表示抽象的事物

D.数据独立性较高

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第3题

下列是抽象行政行为的是：A.《违法停车告知单》B.《最高人民法院关于民事诉讼证据的若干规定》C.《农田

下列是抽象行政行为的是：

A.《违法停车告知单》

B.《最高人民法院关于民事诉讼证据的若干规定》

C.《农田水利条例》

D.《反家庭暴力法》

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第4题

The author brings in the pairs of " Coke and Pepsi, Target and Wal-Mart, Engadget and Gizm

odo"(Para. 4)to make______.

A．a comparison

B．a contrast

C．an abstraction

D．an exemplification

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第5题

下列关于区分抽象行政行为与具体行政行为的表述不正确的是（)。

A.抽象行政行为与具体行政行为的调整范围不同

B.抽象行政行为与具体行政行为能否反复适用不同

C.抽象行政行为与具体行政行为所要求的程序不同

D.行政机关对于抽象行政行为与具体行政行为所拥有的自由裁量权不同

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第6题

下列关于虚方法和抽象方法的描述，错误的是（)。

A.虚方法必须有方法体，可以被子类重写

B.抽象方法不允许有方法体，且必须被非抽象子类重写

C.抽象方法必须在抽象类中，而虚方法可以在所有类中

D.在子类中重写抽象方法或虚方法，都需要用override关键字

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第7题

Molting （换羽,脱毛) is one of the most involved processes of a bird's annual life cycle. N

Molting (换羽,脱毛) is one of the most involved processes of a bird's annual life cycle. Notwithstanding preening (梳理羽毛) and constant care, the marvelously complex structure of a bird' s feather inevitably wears out. All adult birds molt their feathers at least once a year, and upon close observation, one can recognize the frayed (磨损的), ragged appearance of feathers that are nearing the end of their useful life.

Two distinct processes are involved in molting. The first step is when the old, worn feather is dropped, or shed. The second is when a new feather grows in its place. When each feather has been shed and replaced, then the molt can be said to be complete. This, however, is an abstraction (抽象的概念) that often does not happen: incomplete, overlapping, and arrested molts are quite common.

Molt requires that a bird find and process enough protein to rebuild approximately one-third of its body weight. It is not surprising that a bird in heavy molt often seems listless and unwell. But far from being random, molt is controlled by strong evolutionary forces that have established an optimal time and duration. Generally, molt occurs at the time of least stress on the bird. Many songbirds, for instance, molt in late summer, when the hard work of breeding is done but the weather is still warm and food still plentiful. This is why the woods in late summer often seem so quiet, when compared with the exuberant (充满活力的) choruses of spring.

Molt of the flight feathers is the most highly organized part of the process. Some species, for example, begin by dropping the outermost primary feathers on each side (to retain be dance in the air) and wait until the replacement feathers are about one-third grown before shedding the next outermost, and so on. Others always start with the innermost primary feathers and work outward. Yet other species begin in the middle and work outward on both weeks while the replacement feathers grow.

The passage mainly discusses how______.

A．birds prepare for breeding

B．bird feathers differ from species

C．birds shed and replace their feathers

D．birds are affected by seasonal changes

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第8题

下列关于抽象行政行为与具体行政行为的区别，正确的有()。

A.抽象行政行为一般调整不特定的多数人和事，而具体行政行为仅仅针对特定的对象

B.抽象行政行为针对未来发生的事，而具体行政行为都是针对已经发生的事

C.抽象行政行为主要表现为规范性，而具体行政行为表现为确定性

D.抽象行政行为可以反复适用，具体行政行为只适用一次