Reading is not the only way to gain knowledge of all the work in the past. There is another way which may be called experience. College students will find that every craftsman (工匠) has something to teach and will generally teach gladly if they don’t look down on him. The information from the craftsman differs from that in textbooks and papers because that its theoretical part -- the explanations of why things happen -- is frequently quite strange. But the demonstration (示范) of what happens, and how it happens are correct even if they are in completely unscientific words. Presently the college students will learn, in this case also, what to accept and what to reject.
Another source of knowledge is the vast store of traditional practices handed down from father to son, or mother to daughter in old country customs. M1 this is very difficult for a college student to examine, for much knowledge and personal experience is needed here to separate good plants from wild gras
A. what to learn from the parents
B. how to gain knowledge
C. why to learn from craftsman
D. how to deal with experience
Many people have difficulty in studying mathematics. Sometimes their difficulty (61) from the psychological idea that they are "no good (62) math". It has been demonstrated many times that it is often this idea (63) is causing their problems (64) than any lack of skill in mathematics. The (65) way to deal with this problem is to (66) yourself that math "involves using the same numbers you have been using (67) your life and that you know them as well as (68) else". Then set your mind to learning how they are used in the (69) part of mathematics you are studying.
Another problem many people (70) is that in mathematics, unlike some other (71) you may have studied, the material has a very important (72) or order. If you don’t understand a (73) of a mathematics text, it is no (74) going on to the next section. Many sections of math books are (75) o
A. raises
B. rouses
C. arises
D. arouses
Why don’t birds get lost on their long flights from one place to another Scientists have been puzzled over this question for many years. Now they’re beginning to fill in the blanks.
Not long ago, experiments showed that birds rely on the sun to guide them during daylight hours. But what about birds that fly by night (37) Tests with artificial stars have proved that certain night-flying birds are able to follow the stars in their long-distance flights.
A dove had spent its lifetime in a cage and had never flown under a natural sky. Yet it showed an inborn ability to use the stars for guidance. The bird’s cage was placed under an artificial star-filled sky. The bird tried to fly in the same direction as that taken by his outdoor cousins. Any change in the position of the artificial stars caused a change in the direction of his flight.
The stars are apparently their principal means of navigation. When the stars are hidden by clouds, t
A. birds have to be taught to navigate
B. a bird that has been caged will not fly long distances
C. some birds cannot fly at night
D. some birds seem to follow the stars when they fly at night
信号机
照明灯塔
防护信号
接触网
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