题目内容
（请给出正确答案）
How many objects about bananas does the Banana Museum have？
A．1,000.
B．2000
C．3000
D．4000
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更多“How many objects about bananas does the Banana Museum have？A．1,000.B．2000C．3000D．4000”相关的问题
Given（给定如下代码）: class CardBoard { Short story = 5; CardBoard go(CardBoard cb) { cb = null; return cb; } public static void main(String[] args) { CardBoard c1 = new CardBoard(); CardBoard c2 = new CardBoard(); CardBoard c3 = c1.go(c2); c1 = null; // do Stuff } } When // doStuff is reached, how many objects of CardBoard are null？（当代码执行到“// doStuff ”处时，有多少个CardBoard对象为null？）
A、0
B、1
C、2
D、Compilation fails.
Humanity's primal (原始的) efforts to systematize the concepts of size, shapes, and number are usually regarded as the earliest mathematics. However, the concept of number and the counting process developed so long【C1】______ the time of recorded history (there is archaeological【C2】______ that counting was employed by humans as far back as 50,000 years ago) that the【C3】______ of this development is largely conjectural (好推测的). Imaging how it probably came【C4】______ is not difficult. The argument that humans, 【C5】______ in prehistoric times, had some number sense, at least【C6】______ the extent of recognizing the concepts of more and less when some objects were【C7】______ to or taken away from a small group, seems fair, for studies have shown that some animal possesses such a【C8】______ .
With the【C9】______ evolution of society, simple counting became necessary. A tribe had to know how many members it had and how many enemies, and shepherd needed to know【C10】______ the flock of sheep was decreasing in size. Probably the earliest way of keeping a count was by some simple tally (计算, 记录) method,【C11】______ the principle of one-to-one corre-spondence. In【C12】______ a count of sheep, for example, one finger per sheep could be【C13】______ . Counts could also be【C14】______ by making scratches in the dirt or on a stone, by cutting notches in a piece of wood, or by tying knots in a string.【C15】______ , perhaps later, an assortment of vocal【C16】______ was developed as a word tally against the number of objects in, a small group. And【C17】______ later, with the development of writing, a set of【C18】______ was invented to stand for these numbers. Such an imagined development is【C19】______ by reports of anthropologists in their studies of present-day societies that are【C20】______ to be similar to those of early humans.
【C1】
A．after
B．before
C．ahead
D．ago
An astronomer first reported the matter after noting some unusual behaviour in visible matter. In 1993, Swiss astrophysicist Fritz Zwicky concluded that 【C2】______ was causing strange gravitational effects【C3】______ these galaxies.
Galaxies are like【C4】______ islands in deep space【C5】______ billions of stars that are held together by the force of【C7】______ .Some galaxies are part of【C6】______ systems called clusters; which contain many galaxies. Most galaxies; belong to smaller systems called groups. Groups and clusters in 【C8】______ form. even larger【C9】______ known as super-clusters. Just【C10】______ the force of gravity keeps stars together in galaxies the force of gravity【C11】______to keep galaxies together in clusters~
This same force of gravity keeps planets【C12】______ around the sun【C13】______ flying off into space. How great a force gravity exerts depends on the mass of the objects【C14】______ and the distance between them, a【C15】______ discovered by Newton. The amount of mass and the distance between objects also【C16】______ how fast the objects travel as they orbit each other. The force of its gravity keeps Earth and the other planets【C17】______ orbit around it. The orbital speeds of the planets【C18】______ with increasing distance from the sun. The planet nearest to the sun travels at an orbital speed of 48 kilometers per second【C19】______ the distant planet Pluto orbits【C20】______ speed of 7 kilometers per second
【C1】
A．visible
B．invisible
C．perceived
D．tangible
The heat of the furnace is so intense that the mixture of these various materials is changed into a boiling liquid. How is liquid glass formed into beautiful or useful objects？ Let us imagine that we are watching things being made in a glass factory. It is a small factory in which the work is still done by craftsmen and not by machinery.
Here is a man holding a long iron tube called a blow-pipe. The tube has a wooden mouth-piece to protect the man's lips from the heat. He puts the other end of the pipe into the molten glass and picks up some of the mixture on the end of the tube. Then he robs the lump of glass to and fro on a metal table, rather like a person rolling pastry. As he rolls it, he shapes the lump roughly into the required form.
Next he lifts the pipe, puts the wooden end to his lips, puffs out his cheeks and blows as you do when you are blowing up a balloon. But of course he has to blow much harder. When the air is blown down into the lump of molten glass a gorge bubble is gradually formed. The craftsman needs both powerful lungs and great skill to ensure that the bubble is of exactly the required size and thickness.
Now you understand why so many hand-made glass objects are round in shape. Handles and feet must be added while the glass is still plastic. When the object is shaped to the craftsman's satisfaction, it is allowed to cool off. The cooling must be done very gradually. As you know, glass is cracked by extreme and sudden changes of temperature.
Some of the loveliest and many of the most useful things in the world are made of glass. It is most surprising, in view of the great technical skill required, that glass making is a very ancient art. It was practiced thousands of years ago by ancient Egyptians although it was many centuries before men discovered how to make glass transparent.
Glass Making
To remove impurities from the glass,【46】.
Craftsman rolls the molten glass【47】on a metal table.
Glass objects are made【48】.
The mouth-piece of the blow-pipe is【49】.
All glass is【50】.
听力原文： American scientists have found that some birds are more intelligent than experts had originally believed. The scientists say birds have abilities that involve communication and different kinds of memory. In some unusual cases, their abilities seem better than those of humans.
Griffin is a Grey parrot. He lives in his laboratory at the Massachusetts Institute of Technology in Cambridge. Griffin can arrange objects in order of size. He can also combine words in the right order. For example, he will combine words when asking for a piece of food.
Some birds have other memory skills. For example, they collect and store thousands of seeds in autumn, and find them later in winter. These birds use natural objects to find the seeds they have stored. They use at least three objects, such as rocks or trees, to find the stored seeds.
A jay can be trained to choose one object instead of another. The bird uses this skill to receive a prize, such as food.Scientists also say some birds can learn as many as two thousand different songs. They say songs may have developed as a way for birds to communicate with other birds.
Scientists believe that birds must have a special guidance system in their brain. Understanding how a bird's brain operates may help us better understand how a human brain processes information.
(26)
A．Talking.
B．Communication and memory.
C．Singing.
D．Finding the way.
With the (39 ) evolution of society, simple counting became necessary. A tribe had to know how many members it had and how many enemies, and shepherd needed to know (40 ) the ; flock of sheep was decreasing in size. Probably the earliest way of keeping a count was by some simple tally (计算, 记录) method, (41 ) the principle of one-to-one correspondence. In(42 ) a count of sheep, for example, one finger per sheep could be (43 ) . Counts could also be (44 ) by making scratches in the dirt or on a stone, by cutting notches in a piece of wood, or by tying knots in a string. (45 ) , perhaps later, an assortment of vocal (46 ) was developed as a word tally against the number of objects in a small group. And (47 ) later, with the development of writing, a set of(48 ) was invented to stand for these numbers. Such an imagined development is (49 ) by reports of anthropologists in their studies of present-day societies that are (50 ) to be similar to those of early humans.
31.
[A] after
[B] before
[C] ahead
[D] ago
翻译练习（一） Plastics No other material in the history of the world has been used for so many different purposes. But what special qualities do plastics have？ Why do countless people possess so many things made of plastics？ They buy plastic articles because they are not only cheaper but also often much better than articles made of other materials, because their smooth surfaces are so easy to keep clean, because they will not catch fire, and because they are not damaged by water. It is quite extraordinary how many different kinds and qualities of plastics there are. They can be harder than wood or softer than rubber. They can be made so strong that they will last almost forever. They can be made as clean as glass or completely black. They can be made any color you like to choose. They can even be made to look like wood or rubber. The manufacture of plastics requires a large quantity of heavy machines as well as a knowledge of science. Today the greater part of plastics is manufactured by the world's great oil refineries and chemical works. Chemical works are factories which produce chemicals ― a man-made liquids, gases and solid materials. The refineries and chemical works produce many different kinds of raw plastics, which are then taken to the tens of thousands of factories which made plastic products. Machines for making plastic objects are very different from those used for manufacturing articles of wood or metal or other natural materials. For raw plastics must first be softened by heat and then pressed into moulds. It is the moulds which give plastic objects their shapes. These moulds can be of any shape or size. And the same mould can be used over and over again. In fact one mould can produce many thousands of articles before it wears out. This is one of the reasons why plastic things are so cheap.
You might not know how rarely images are viewed directly through telescopes. The most common way to observe the skies is to photograph them. The process is very simple. First a photographic plate is coated with a light-sensitive material. The plate is positioned so that the image received by the telescope is recorded on it. Then the image can be developed, enlarged and published so that many people can study it.
Because most astronomical objects are very remote, the light we receive from them is rather feeble. But by using a telescope as a camera long-time exposures can be made.
In this way, objects can be photographed that are a hundred times too faint to be seen by just looking through a telescope.
According to the speaker, what do people often think about astronomers？
A．They spend most of their time looking through telescopes.
B．They are constantly analyzing data.
C．They often live near observatories.
D．They devote a lot of time to theoretical problems.
听力原文： Most people think of astronomers as people who spend their time in cold observatories peering through telescope every night. In fact, a typical, astronomer spends most of his or her time analyzing data and may only be at the telescope a few weeks of the year. Some astronomers work on purely theoretical problems and never use a telescope at all. You night not know how rarely images are viewed directly through telescopes. The most common way to observe the skies is to photograph them. The process is very simple. First, a photographic plate is coated with a lightsensitive material. The plate is positioned so that the image received by the telescope is recorded on it. Then, the image cam he developed, enlarged and published so that many people can study it. Because most astronomical objects are very remote, the light we receive from them is rather feeble. But by using a telescope as a camera, long time exposures can be made. In this way objects can be photographed that are a hundred times tm faint to be seen by just looking through a telescope.
(20)
A．They devote a lot of time to theoretical problems.
B．They spend most of their time looking through telescopes.
C．They are constantly analyzing data.
D．They often live near observatories.
UFOs
Sixty years ago, a man named Kenneth Arnold saw something that we can still __________ (51)today-- something that changed popular culture for ever.
Flying his plane over mountains in the US state of Washington, he saw a line of strange objects, either crescent-shaped (月牙形的 ) or disc-like, flying __________ (52) the motion of a saucer (碟) skimming (飞速掠过) on water.
The media soon picked up on the story--the Flying Saucers were here! Was the earth being__________ (53) by creatures from another planet？ Soon, So many sightings were made that the US military began to __________ (54). It called these strange Objects UFOs--Unidentified Flying Objects, and that is how they are __________ (55)today.
Military investigations found no evidence of visitors from outer space. But that did not stop the true __________ (56). The military were __________ (57) up, they said. Or maybe it was because the travelers from space were of such superior intelligence __________ (58) they could hide from military analysts (分析家) .
People have always seen strange lights in the sky. In the past these were explained in __________ (59)ways. In a world where religion was less infuenfial and science fiction was popular, signs from God were replaced by visitors from other __________ (60).
The date of the first UFO sightings was also significant. In 1947, World War I! had just ended and the __________ (61) War was just beginning. Humanity seemed locked in endless conflicts.
Like generations before them, people looked __________ (62) the skies for help. But instead of seeking God, they looked for help from super-intelligent aliens (外星人) with __________ (63)technology. Belief in UFOs became the first religion of science.
However, even people who believe in UFOs are not quite sure why they visit the earth. The universe is a big place and it is __________ (64) to assume that there is life somewhere out there.
It is possible that aliens have worked out how to travel through space. Yet some people report that they have been taken by aliens and have had experiments __________ (65) on them. Why would anyone travel across half the universe to conduct medical experiments on people living in small towns in the United States？
___________ 查看材料
A.look
B.see
C.seek
D.feel
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