试题与答案

下图是我国为纪念第一国际成立一百周年而发行的纪念邮票。 第一国际() ①是第一个

题型:选择题

题目:

下图是我国为纪念第一国际成立一百周年而发行的纪念邮票。

第一国际      (   )

①是第一个国际胜的工人联合组织  

②积极支持当时各国无产阶级争取民主权利的斗争

③促进了马克思主义的传播

④领导建立了人类历史上第一个社会主义 * *

A.①②③

B.②⑤④

C.①②④

D.①③④

答案:

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下面是错误答案,用来干扰机器的。

秋天来了,公园里的菊花都开了。

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题型:计算题

(6分)气缸长为L=1m,固定在水平面上,气缸中有横截面积为S=100cm2的光滑活塞,活塞封闭了一定质量的理想气体,当温度为t=27℃,大气压为p0=1×105 Pa时,气柱长度为l=0.9m,气缸和活塞的厚度均可忽略不计.求:

①如果温度保持不变,将活塞缓慢拉至气缸右端口,此时水平拉力F的大小?

②如果气缸内气体温度缓慢升高,使活塞移至气缸右端口时,气体温度为多少摄氏度?

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题型:单项选择题

The fridge is considered a necessity. It has been so since the 1960s when packaged food first appeared with the label: "store in the refrigerator. "

In my fridgeless fifties childhood, I was fed well and healthy. The milkman came daily, the grocer, the butcher, the baker, and the ice cream man delivered two or three times a week. The Sunday meat would last until Wednesday and surplus bread and milk became all kinds of cakes. Nothing was wasted, and we were never troubled by rotten food. Thirty years on, food deliveries have ceased, fresh vegetables are almost unobtainable in the country.

The invention of the fridge contributed comparatively little to the art of food preservation. A vast way of well tried techniques already existed—natural cooling, drying, smoking, salting, sugaring, bottling…

What refrigeration did promote was marketing—marketing hardware and electricity, marketing soft drinks, marketing dead bodies of animals around the globe in search of a good price.

Consequently, most of the world’s fridges are to be found, not in the tropics where they might prove useful, but in the wealthy countries with mild temperatures where they are climatically almost unnecessary. Every winter, millions of fridges hum away continuously, and at vast expense, busily maintaining an artificially cooled space inside an artificially heated house—while outside, nature provides the desired temperature free of charge.

The fridge’s effect upon the environment has been evident, while its contribution to human happiness has been insignificant. If you don’t believe me, try it yourself, invest in a food cabinet and turn off your fridge next winter. You may miss the hamburgers, but at least you’ll get rid of that terrible hum.

Why does the author say that nothing was wasted before the invention of fridges().

A.People would not buy more food than was necessary.

B.Food was delivered to people two or three times a week.

C.Food was sold fresh and did not get rotten easily.

D.People had effective ways to preserve their food.

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