简述鱼苗肥水下塘的基本原理。

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问题:

简述鱼苗肥水下塘的基本原理。

考点:水产学池塘养鱼池塘养鱼题库
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When the TV viewer turns on his set, what sort of programs does he have to choose from? You might think there would be more programs devoted to entertainment than to anything else, but that’s not the case. In most countries, fewer than 20% of broadcasting hours are devoted to entertainment. U.S. figures are high----34.8% , and the unloving Canadians are even higher with 44%. Except Canada and Italy, all countries give more broadcasting time to education than to either information (news , documentaries and so on) or entertainment programs. Of course, few educational broadcasts take place during peak viewing times. In Japan though , more than 60%of broadcasting time is taken up with education of one kind of anther----just another example of the businesslike Japanese philosophy. In the U.K., the figure is 56.4% . the Italians have fewer educational programs than anyone else. They don’t go in for entertainment either. Only about ten percent of viewing time is devoted to dramas and serials, quiz shows, music, sports etc. You will find more news information programs on Italian TV than anything else. That’s understandable in a country experiencing social and political changes. Italians rely on TV to tell them what’s going on---and events are happening almost too fast to follow. The percentage of time the U.S. devoted to news and documentary programs is much smaller. After education, most TV time is given to entertainment. Many of these programs are shown around the world.

小题1:Based on this passage, the greatest percentage of TV broadcasting hours to educational is in __.

A.Japan

B.Italy

C.Canada

D.the United States小题2:More news information programs are broadcast on Italian TV than anywhere else because the Italians ___.

A.are interested in what is happening in the world.

B.Like to follow the changes that are going on in their social life

C.Prefer to learn news information on TV rather than in newspapers

D.Expect TV to tell them the latest news about what is going on in their country小题3: So far as the broadcasting hours devoted to entertainment , which of the following is true?

A.The Japanese figure is the highest in the world.

B.The U.S. figure is smaller than the U. K. figure

C.The U.K. figure is second to the Japanese figure

D.The Canadian figure is higher than that of any other country.小题4:In the United States, ____.

A.TV programs are shown for world audience to watch

B.Most of TV broadcasting hours are give to entertainment

C.Educational programs are shown during peak viewing times

D.TV broadcasting hours devoted to education are more than those devoted to entertainment

题型:问答题 简答题

该省人口出生率最高的是()

A.1975年

B.1970年

C.1972年

D.1990年

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下列有关信用政策的表述中,正确的有()。

A.缩短信用期间可能增加当期现金流量

B.积极型收账政策有利于减少坏账损失

C.降低信用标准意味着将延长信用期间

D.延长信用期间将增加应收账款的机会成本

E.信用条件包括信用期间、现金折扣和收账政策

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