GRE考试

【单选题】Despite the ubiquity of computer technology, most people are unaware that
Line computers exist in two mutually exclusive, distinct categories: analog and digital.
We are most familiar with digital computers, such as laptops. On the one hand,
digital computers process information using a binary number system that allows
(5) them to calculate numbers in an accurate and exact manner.Analog computers,
on the other hand, do not calculate per se; they measure and respond to a
continuously changing input.
Simple analog computers, called astrolabes, were first developed by the
Greeks to solve problems in astronomy. The devices proved very popular and
(10) soon spread throughout the Roman worlD、By the 10th century, Muslim scholars
had developed the astrolabe into a sophisticated mechanical device capable of
calculating solutions to problems not only in astronomy, but also in astrology,
navigation, surveying, and timekeeping.
Modern scientific opinion was that the ancient Greeks had been
(15) technologically unable to produce a similarly sophisticated computer, until a
discovery was made just over a century ago. In 1900, divers discovered the wreck
of a merchant ship, possibly dating back to 150BCE, off the coast of the Greek
islandAntikytherA、In the wreckage, they found the remains of a complex device
apparently a thousand years ahead of its time.
(20) Made of metal, this device, known as theAntikythera mechanism, is
approximately the size of a shoebox.At the time of its discovery, it was in terrible
shape, having been underwater for so long. Its pieces had merged into a broken
mass and experts could discern only that it had something to do with astronomy.
Thanks to a combination of advanced imaging methods and X-ray computer
(25) tomography, however, scientists have since discovered much more.
Originally, the mechanism had at least 30 bronze gears with as many as 225
hand-cut triangular teeth. It had three main dials, one on the front and two on the
back, respectively marking the astronomical divisions of theEgyptian calendar,
the Metonic cycle, and the Saros cycle.Each dial had subdials for greater
(30) specificity. For example, the front dial contained a smaller dial that could be
adjusted to account for leap years. There were also hands and gearing to account
for the movements of the planets.
While the workings of the device are now fairly well understood, researchers
are still puzzled by the reason it was made. Some postulate that it, like later
(35) astrolabes, was used to create astrological charts, or to set feast days, or even to
adjust the lunar and solar calendars. Others have thought it was a curiosity made
solely for display. The device’s relatively small size and the inclusion of a 3,000
character "user’s manual" suggest that the mechanism was created to be portable
and functional, but scientists are no closer to knowing for sure and can only
(40) wonder at the purpose of its superb design.
Which of the following would weaken the author’s argument that theAntikythera mechanism was a thousand years ahead of its timeA．Items discovered on theAntikythera shipwreck were found to date back to 500BCE、
B．Similarly complex astrolabes were recently found at a series of archeological sites dating between 100 and 500CE、
Complex machines involving pulleys and ropes were found at archeological sites on the Greek island ofAntikytherA、
D．At the time of theAntikythera shipwreck, the island of Rhodes was famous for its collection of scientific devices.
E、Ancient Romans were famous for their acquisitions of G
网考网参考答案：B
网考网解析：
If similar mechanisms were found that were separated from the Antikythera mechanism by only a few centuries, then the device would not be a thousand years ahead of its time. Therefore, answer choice B is best. The other choices are either outside the scope of the question or are irrelevant. document.getElementById("warp").style.display="none"; document.getElementById("content").style.display="block"; 查看试题解析出处>>