单选题阅读下面的短文，文中有15处空白，每处空白给出了4个选项，请根据短文的内容从4个选项中选择1个最佳答案。
{{B}}Captain Cook Arrow Legend{{/B}} It was a great legend
while it lasted, but DNA testing has{{U}} (51) {{/U}}ended a
two-century-old story of the Hawaiian arrow carved from the bone of British
explorer Captain James Cook{{U}} (52) {{/U}}died in the Sandwich Islands
in 1779. "There is{{U}} (53) {{/U}}Cook in the
Australian Museum," museum collection manager Jude Philip said not long ago in
announcing the DNA evidence that the arrow was not made of Cook's bone. But that
will not stop the museum from continuing to display the arrow in its{{U}}
(54) {{/U}}"Uncovered: Treasures of the Australian Museum," which{{U}}
(55) {{/U}}include a feather cape presented to Cook by Hawaiian King
Kalani 'opu'u in 1778. Cook was one of Britain's great explorers
and is credited with{{U}} (56) {{/U}}the "Great South Land,"{{U}}
(57) {{/U}}Australia, in 1770. He was clubbed to death in the Sandwich
Islands, now Hawaii. The legend of Cook's arrow began in 1824{{U}}
(58) {{/U}}Hawah'an King Kamehameha on his. deathbed gave the arrow m
William Adams, a London surgeon and relative of Cook's wife, saying it was made
of Cook's bone after the fatal{{U}} (59) {{/U}}with islanders.
In the 1890s the arrow was given to the Australian Museum and the legend
continued{{U}} (60) {{/U}}it came face-to-face with science.
DNA testing by laboratories in Australia and New Zealand revealed the
arrow was not made of Cook's bone but was more{{U}} (61) {{/U}}made of
animal bone, said Philp. However, Cook's fans{{U}} (62)
{{/U}}to give up hope that one Cook legend will prove true and that part of
his remains will still be uncovered, as they say there is evidence not all of
Cook's body was{{U}} (63) {{/U}}at sea in 1779. "On this occasion
technology has won," said Cliff Thornton, president of the Captain Cook Society,
in a{{U}} (64) {{/U}}from Britain. "But I am{{U}} (65)
{{/U}}that one of these days ...one of the Cook legends will prove to be
true and it will happen one day."
单选题When the United States stock market fell in 1929, many stockholders were forced to sell their shares at {{U}}ludicrously{{/U}} low prices.
单选题It is said the houses along this street will soon be demolished.A. pulled downB. pulled upC. pulled offD. pulled in
单选题The cards that are wildly used now are credit.cards.
单选题The depiction of the lives of black people in the south is
graphic
.
单选题下面的短文后列出了7个句子，请根据短文的内容对每个句子做出判断：如果该句提供的是正确信息，请选择A；如果该句提供的是错误信息，请选择B；如果该句的信息文中没有提及，请选择C。
{{B}}Radiocarbon
Dating{{/B}} Nowadays scientists can answer many questions about
the past through a technique called radiocarbon (放射性碳),or carbon-14,dating. One
key to understanding how and why something happened is to discover when it
happened. Radiocarbon dating was developed in the late 1940s by
physicist Willard F. Libby at the University of Chicago. An atom of ordinary
carbon, called carbon-12, has six protons (质子)and six neutrons (中子)in its
nucleus(原子核). Carbon-14,or C-14,is a radioactive,unstable form of carbon that
has two extra neutrons. It returns to a more stable form of carbon through
a process called decay(衰减). This process involves the loss of the extra
neutrons and energy from the nucleus. In Libby's radiocarbon
dating technique, the weak radioactive emissions (放射)from this decay orocess are
counted by instruments such as a radiation detector and counter. The decay rate
is used to determine the proportion of C-14 atoms in the sample being
dated. Carbon-14 is produced in the Earth's atmosphere when
nitrogen(氮)-14,or N-14, interacts with cosmic rays(宇宙射线). Scientists
believe since the Earth was formed, the amount of nitrogen in the atmosphere
has remained constant. Consequently,C-14 formation is thought to occur at
a constant rate. Now the ratio of C-14 to other carbon atoms in the atmosphere
is known. Most scientists agree that this ratio is useful for dating items back
to at least 50,000 years. All life on Earth is made of organic
molecules(分子)that contain carbon atoms coming from the atmosphere. So all living
things have about the same ratio of C-14 atoms to other carbon atoms in their
tissues(组织). Once an organism(有机体)dies it stops taking in carbon in any
form, and the C-14 already present begins to decay. Over time the amount of C-14
in the material decreases, and the ratio of C-14 to other carbon atoms goes
down. In terms of radiocarbon dating,the fewer C-14 atoms in a sample,the older
that sample is.
单选题We packed up the things we had accumulated (积累) over the Ulast/U three years and left.
单选题Red giant stars do not become white dwarf stars
abruptly
; the process takes more than fifteen hundred years.
单选题I had the very pleasure of ______ with your husband in the meeting last week.A. knowledgeB. identificationC. acquaintanceD. recognition
单选题 阅读下面这篇短文，短文后列出7个句子，请根据短文的内容对每个句子做出判断。
{{B}}Norwich{{/B}} Norwich, the capital of the part of Britain
known as East Anglia, has been in existence for more than two thousand years. It
began as a small village beside the River Wensum. At the time of the Norman
invasion in 1066 it had grown to become one of the largest towns in
England. With two cathedrals and a mosque(清真寺), Norwich has long
been a popular centre for various religions. The first cathedral was built in
1095 and has recently celebrated its 900th anniversary, while Norwich itself had
a year of celebration in 1994 to mark the 800th anniversary of the city
receiving a Royal Charter. This allowed it to be called a city and to govern
itself independently. Today, in comparison with places like
London or Manchester, Norwich is quite small, with a population of around
150,000, but in the 16th century Norwich was the second largest city of England.
It continued to grow for the next 300 years and got richer and richer, becoming
famous for having as many churches as there are weeks in the year and as
many pubs as their are days in the year. Nowadays, there are far
fewer churches and pubs, but in 1964 the University of East Anglia. was built in
Norwich. With its fast-frowing student population and its success as a modern
commercial centre (Norwich is the biggest centre for insurance services outside
London), the city now has a side choice of entertainment: theatres, cinemas,
nightclubs, busy cafes, excellent restaurants, and a number of arts and leisure
centres. There is also a football team, whose colours are green and yellow. The
team is known as "The Canaries (金丝雀)",though nobody can be sure why.
Now the city's attractions include another important development, a
modern shopping centre called "The Castle Mall". The people of Norwich lived
with a very large hold in the middle of their city for over two years, as
builders dug up the main car park. Lorries moved nearly a million tons of earth
so that the roof of the mall could become a city centre park, with attractive
water pools and hundreds of trees, but the local people are really pleased that
the old open market remains, right in the heart of the city and next to the new
development. Both areas continue to do good business, proving that Norwich has
managed to mix the best of the old and the new.
单选题They only have a limited amount of time to get their points across. A. large B. total C. small D. similar
单选题The leading astronomers of the sixteenth and seventeenth centries were {{U}}fascinated{{/U}} by comets.
单选题Although I sympathize, I can't really do very much to help. A．Because B．Since C．Though D．For
单选题They are
endeavoring
to reform the present rules.
单选题We can infer from the fifth paragraph that
单选题Rodman met with Tony to try and
settle
the dispute over his contract.
单选题Professor Taylor"s talk has indicated that science has a very strong
influence
on the everyday life of non-scientists as well as scientists.
单选题The town is famous for its magnificent church towers. A. ancient B. old C. modern D. splendid
单选题The worst Uagonies/U of the war were now beginning.
单选题This is the first research finding about the planets with a chance for life.