【文章內(nèi)容簡介】 on the ocean bottom, only a handful, less than one percent, contain negotiable treasure, such as gold and jewels. Most give us a different, priceless treasure history. A sunken ship lies in trust, preserved in the airless environment of the sea, and those in deep water are especially well protected. No dry land sites anywhere —except perhaps Egyptian tombs are in a better state of preservation than a vessel deep in the ocean. A sunken ship, therefore, can be a rare window through which a moment in time is glimpsed.This is not to imply that sunken ships are always found intact. Most ships break up on the way down, hit the bottom at about 100 miles per hour, and bee a chaotic, confusing jumble (混亂的一堆). I recall the disappointment of a novice diver who , after surfacing from an underwater tour of a 400foot ship, asked his diving panion, “Where was the wreck?” It takes experience to actually know sunken ship when one sees it.But no matter what its condition on the way down, a ship deteriorates（朽爛） much more slowly as it sinks deeper into protective layer of sand and mud. Ancient vessels have been found in remarkably good condition. In 1997 a group of marine archaeologists excavating a 900yearold wreck recovered engraved glassware, Greek coins, bronze kettles, and amazingly, Greek jars containing seeds, almonds, and peanuts—even a plate with chicken bones.49．Which of the following is meant by the “priceless treasure” mentioned in line 2?A．Valuable information. B．Ancient coins. C．Precious stones. D．Old books.50．According to the passage, what usually happens to a ship as it sinks?　　A．It remains in an upright position. B．It gets transported by the currents.　　C．It breaks into pieces. D．It attracts marine life.51．Which objects found on the 900yearold wreck most surprised the author?　　A．Money. B．Jars. C．Chicken bones. D．Glassware.52．Which features of an ancient ship is of most interest to the author?　　A．Speed. B．Contents. C．Location. D．Design.DSuppose you go into a fruit shop, wanting an appleyou take up one, and on biting it you find it is sour。 you look at it, and see that it is hard and green. You take up another one, and that, too, is hard, green, and sour. The shop man offers you a third。 but ,before biting it, you examine it, and find that it is hard and green ,and you immediately say that you will not have it, as it must be sour, like those that you have already tried.Nothing can be more simple than that, you think。 but if you will take the trouble to analyze and trace out into its logical elements what has been done by the mind, you will be greatly surprised.You find that, in two experiences, hardness and greenness in apples went together with sourness. It was so in the first case, and it was confirmed by the second. It is a very small basis, but still it is enough from which to make an induction(歸納). You found upon that a general law that all hard and green apples are sore。 and that, so far as it goes, is a perfect induction. Well, having got your natural law in this way, when you are offered another apple, which you find it hard and green, you say, All hard and green apples are sour。 this apple is hard and green。 therefore, this apple is sour. And by further reasoning, you arrive at your final determination, “I won’t have that apple.”Well now, suppose, having got your conclusion of the law, that at some times afterwards, you are discussing the qualities of apple with a friend。 you will say to him, It is a very curious thing, but I find that all hard and green apples are sour! Your friend says to you, But how do you know that? You at once reply, Oh, because I have tried them over and over again, and have always found them to be so Well, if we were talking science instead of mon sense, we should call that an experimental verification(實(shí)驗(yàn)證明). And, if still opposed, you go further, and say, I have heard from people. In Somersetshire and Devonshire, where a large number of apples are grown, and in London, where many apples are sold and eaten, that they have observed the same thing. It is also found to be the case in Normandy, and in North America. In short, I find it to be the universal experience of mankind wherever attention has been directed to the subject. Whereupon, your friend ,unless he is a very unreasonable man, agrees with you, and is convinced that you are quite right in the conclusion you have drawn. He believes, although perhaps he does not know he believes it, that the more extensive verifications have been made, and results of the same kind arrived atthat the more varied the conditions under which the same results are attained, the more certain is the ultimate conclusion, and he disputes the question no further. He sees that the experiment has been tried under all sorts of conditions, as to time ,place, and people, with the same result。 and he says with you, therefore, that the law you have laid down must be a good one, and he must believe it.53．The example of “apples” are used . A．to convince the reader that fruit can help you induct B．to illustrate the topic of the passage C．to give a bit of color to the story D．to show readers how foolish logic is54．The term natural law as it appears in the text refers to________. A．mon sense B．the result of an Induction C．the order of nature D．a(chǎn) scientific discovery55．If you find a hard and green apple that is not sour, you should ________. A．try more apples to see if the natural law has changed B．eat the rest of the apple at once to see if it is sour too C．reject the law stating that hard and green apples are usually sour D．conduct further investigations