问题 选择题

1929年,梁启超身体渐趋恶化,学生谢国桢和萧龙权劝他停止工作,赶紧休息。梁说:“战士死于沙场,学者死于讲坛。”不久,梁启超不治而逝。1982年,谢国桢因病住院,犹坚持看书不已,萧龙权的儿子萧璋去看他,劝他养病期间不要看书,注意休息。谢说:“战士死于沙场,学者死于讲坛。师训不可违。”材料表明

A.老师的言行会潜移默化地影响学生

B.老师对学生的关心和爱护,是老师应尽的责任

C.教师工作最大的特点在于每天和学生交往

D.新型的师生关系是平等、尊重、理解、信任

答案

答案:A

题目分析:梁启超的学生谢国桢在养病期间仍然不忘读书,是因为老师梁启超的影响。老师被誉为人类灵魂的工程师;老师的工作不只是传播知识,老师的巨大力量在于作出榜样,老师在我们的成长过程中发挥着不可替代的作用。可见老师的言行会潜移默化地影响学生

单项选择题

Passage Two

The value of heat for the preservation of food has been known for thousands of years, but it was not realized until the nineteenth century that a very mild heat treatment far below the boiling point, made liquid foods such as milk keep much longer. The discovery followed the work of the French scientist Louis Pasteur on wine and beer.

The process, called after him "pasteurization", is a carefully controlled mild heat treatment. It was found that the process served two purposes, it prevented the souring of milk, and it destroyed the dangerous disease germs which sometimes occur in this product.

It has long been known to bacteria experts that the tubercle bacillus is the germ in milk which host ply resists heat treatment. To destroy this organism it is necessary to heat milk to about 60 degrees centigrade for 15 minutes, and its destruction has always been taken as a way of testing the efficiency of pasteurization. A heat treatment of this kind destroys about 99 percent of the common bacteria in milk, including nearly all those which cause milk to turn sour.

To ensure the certain destruction of tuberculosis and other disease germs in milk, it must be held at a fixed temperature for a fixed time. In Britain, for example, these conditions were defined-coy law in 1923 as 63-66 degrees centigrade for 30 minutes. This became known as the "holder" process, since the raw milk had to be pumped into a large tank, heated to just over 63 degrees centigrade, held in the tank for half an hour and then pumped out and cooled. This was a slow process and required a very large plant, so scientists worked for many years to produce a simpler, more convenient method, with less large equipment.

The latest method, officially approved in Britain in 1949, is known as the high-temperature-short-time, or H. T. S. T. method. It has now almost entirely replaced the "holder" process. In the H. T. S. T. system, the milk flows continuously through many sections of thin stainless steel pipes, During the process, the milk is held at 72 degrees centigrade for at least 15 seconds then, as it-cools, the heat is used, in part, to raise the temperature of the incoming milk in a device called a "wheat exchanger".

Efficient pasteurization may reduce the bacteria in raw milk from, say, one million to only a few thousand per cubic centimeter. The bacteria left are chemically mostly of the inert type, thatis, they either do not.

How is it tested whether a milk pasteurization is efficient or not ?()

A.By testing the heating temperature.

B.By testing the quantity of bacillus causing tuberculosis.

C.By testing the time duration of heating

D.All of the abov

多项选择题