POS means point of sale

, or short. Concise words, however, are comprehensive; they carry the write’s full meaning.

dmother's grave." The end of a long and legendary way means the __________ of the journey.

A、destination

B、starting point

point of origin intended for several consignees at another point of destination，dispatching the parcels as one consolidated consignment to the consolidator’s agent at the destination and delivering them to their respective consignees．()

A．正确

B．错误

s at one point of origin intended for several consignees at another point of destination, dispatching the parcels as one consolidated consignment to the consolidator' s agent at the destination and delivering them to their respective consignees. （）

Which of the following best states the author's main point about logical argument？

A．It is a sterile, abstract discipline, of little use in real life.

B．It is an essential element of persuasive discourse, but only one such element.

C．It is an important means of persuading people to act against their desires.

D．It is the lowest order of discourse because it is the less imaginative.

"Even exercise professionals concede 'half a point here" (Sentence 2, Paragraph 2) means "they ______".

A．agree that the calories in a small piece of pastry can be difficult to work off by exercise

B．partially believe diet plays a supporting role in weight reduction

C．are not fully convinced that dieting can help maintain one's new weight

D．are not sufficiently informed of the positive role of exercise in losing weight

"Even exercise professionals concede half a point here" (Line 3, Para. 2) means "They ______."

A．agree that the calories in a small piece of pastry can be difficult to work off by exercise

B．partially believe diet plays a supporting role in weight reduction

C．are not fully convinced that dieting can help maintain one's new weight

D．are not sufficiently informed of the positive role of exercise in losing weight

ecrease of the ozone layer, the protective layer in the atmosphere that shields the earth from the sun's harmful rays." The word "shield" means ______.

A．cloak

B．guard

C．defend

D．protect

the passage？

A．Einstein was not a thoroughgoing realist, in particular where the interpretation of quantum mechanics was concerned.

B．When Newton predicted that gravity affects all objects equally, his theory was not improved by experimental trials.

C．Those impressed by Hume's argument often conclude that experience plays only a psychological or rhetorical role.

D．Pasteur's search for a means of bacterial sterilization was assisted greatly by the process of experiment.

E．Galileo's astronomy theory itself was less reliable than the predictions he drew from it.

onent's king in a series of moves. In creating a lens a lens designer attempts to "trap" light by forcing all the rays arising from a single point in the subject to focus on a single point in the image, as a consequence of their passing through a series of transparent(透明的) elements with precisely curved surfaces. Since in both cases the ultimate goal and the means by which it call be attained are known, one is tempted to think there will be a single best decision at any point along the way. The number of possible consequences flowing from any one decision is so large, however, as to be virtually, if not actually, infinite. Therefore in lens design, as in chess, perfect solutions to a problem arc beyond reach. Although this article will be concerned only with the design of photographic lenses, the same principles apply to all lenses.

The lens designer has one enormous advantage over the chess player: the designer is free to call on any available source of help to guide him through the staggering number of possibilities. Most of that help once came from mathematics and physics, but recently computer technology, information theory, chemistry, industrial engineering and psychophysics have all contributed to making the lens designer's job immeasurably more productive. Some of the lenses on the market today were inconceivable a decade ago. Others whose design is as much as a century out can now be mass-produced at low cost. With the development of automatic production methods, lenses are made by the millions, both out of glass and out of plastics. Today's lenses are better than the best lenses used by the great photographers of the past. Moreover, their price may lower, in spite of the fact that 19th-century craftsmen worked for only a few dollars a week and today's lenses are more complex. The lens designer cannot fail to be grateful for the science and technology that have made his work easier and his creations more widely available, but he is also humbled: it is no longer practical for a fine photographic lens to be designed from beginning to end by a single human mind.

Lens design and chess playing are similar in that______.

A．the final goal and the means by which it can be reached are known

B．perfect solutions to a problem can be found

C．any one decision at any point along the way to the goal can bring numerous possible results

D．both A and C