“指南针的使用,大大推动意大利各商业共和国航海业的发展,气候因素再也不能成航海的...

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“指南针的使用,大大推动意大利各商业共和国航海业的发展,气候因素再也不能成航海的障碍,到了13世纪最后后二十五年里,一艘船完全可以绕地中海两次环行,甚至冬季里也能开船。“这说明( )

新航路的开辟从意大利开始

指南针促进了意大利经济的发展

指南针由意大利人传人欧洲

指南针不受气候因素干扰

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【单选题】在C#中,下列代码的运行结果是(BB)。

t a = 30 , b = 20;

= a;

= 10;

nsole.WriteLine(a);

nsole.WriteLine(b);

10 换行 10

10 换行30

30 换行20

10 换行20

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【简答题】is the most important parameter in water pollution control , used as a measure of organic pollution and as a basis for estimating the oxygen needed for biological processesA. TOC B. COD C. BOD D. VSS

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【简答题】生物污染(biological pollution)

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【单选题】The fishing ban is regarded as a key move to stop the _____of biological resources and degradation of biodiversity in the Yangtze River, which has been damaged by overfishing and pollution.

deletion

separation

depletion

implementation

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【多选题】关于定金与押金，下列说法正确的是( )。

定金和押金都有担保的功能

定金具有违约救济功能而押金没有

定金不能超过合同标的额而押金则可以

发生违约时，定金适用定金罚则而押金则不适用

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【简答题】Air pollution occurs when harmful or excessive including gases, particles, and biological molecules are introduced into the Earth's atmosphere.(quantities of substances / quantities of smog)

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【单选题】The average daily __________ of fruit and vegetables is around 200 grams.

pollution

emotion

consumption

destruction

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【简答题】Biological pollution refers to the origin of pollutants from living organisms, including 、、 , as well as pollution caused by human beings themselves and their life activities

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【简答题】Air pollution occurs when harmful or excessive including gases, particles, and biological molecules are introduced into the Earth's atmosphere.

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【单选题】在C#中,下列代码的运行结果是() int a=30,b=20; b= a; a=10; Console.WriteLine(a); Console.WriteLine(b);

10 20

10 10

10 30

30 20

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相关题目：

【单选题】在C#中,下列代码的运行结果是(BB)。

t a = 30 , b = 20;