The dog has always been considered man’ s best friend. Always noted for being particularly faithful in watching over children, he also has his place by the fireside, in the cow pasture, on the sheep range(放牧区), and beside the hunter in forest. He is easy to train, works hard, and often performs astonishing feats. And in the frozen polar regions he was once the principal motive power, before being lately displaced by the plane and helicopter. Because he howls or whines in the presence of impending death, the dog was once thought to have supernatural powers and believed to be capable of seeing gods and ghosts invisible to men. Actually, the basis for these beliefs lies in the hound’ s sensibility to people’ s feelings and his superior hearing ability and sense of smell, which enable him to detect signs hidden from human observation. His record of saving lives is outstanding, for he often gives warning of fire and other dangers not noticed by his master. The dog&rs
A. carried supplies
B. provided companionship
C. tracked prey
D. herded caribou(驯鹿)
Man has been storing up useful knowledge about himself and the universe at the rate which has been spiraling upward for 10,000 years.
The (21) took a sharp upward leap with the invention of writing, but even (22) it remained painfully slow for several centuries. The next great leap forward (23) knowledge acquisition did not occur (24) the invention of movable type in the 15th century by Gutenberg and others. (25) to 1500, by the most optimistic (26) Europe was producing books at a rate of 1000 titles per year. This means that it (27) a full century to produce a library of 100,000 titles. By 1950, four and a half (28) later, the rate had accelerated so sharply that Europe was producing 120,000 titles a year. (29) once took a century now took only ten months. By 1960, a (30) decade later, the rate had made another significant jump, (31) a century’s work could be finished in seven
A. fit
B. like
C. resemble
D. parallel
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