题目内容
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A．The older animals look after the younger ones.
B．The younger animals look after the older ones.
C．The mothers teach their daughters.
D．The mothers set a good example for their daughters.
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A．the older as individual carnivore is, the more likely it is to have a large number of tooth fratures
B．the average age at death of a present-day carnivores is greater than was the average age at death of a Pleistocene carnivore
C．in Pleistocene carnivore species, older individuals consumed carcasses as thoroughly as idd younger individuals
D．the methods used to determine animals’ ages in fossile samples tend to misidentify many older individuals as younger individuals
E．data concerning the ages of fossil samples cannot provide reliable information about behavioral differences between extinct carnivores and present-day carnivores
The discovery and utilization of fire, a simple energy source with many profound uses, was a turning point in the technological evolution of mankind. The exact date of its discovery is not known; evidence of burnt animal bones at the Cradle of Humankind suggests that the domestication of fire occurred before 1,000,000BCE; scholarly consensus indicates that Homo erectus had controlled fire by between 500,000BCE and 400,000BCE. Fire, fueled with wood and charcoal, allowed early humans to cook their food to increase its digestibility, thereby improving its nutrient value and broadening the number of foods that could be eaten.
Other technological advances made during the Paleolithic (旧石器时代的)era were clothing andshelter; the adoption ofboth technologies cannot be dated exactly, but they were key to humanity's progress.
As the Paleolithic era progressed, dwellings became more sophisticated and more elaborate; as early as 380,000BCE, humans were constructing temporary wood huts. Clothing, adapted from the fur and hides of hunted animals, helped humanity expand into colder regions; humans began to migrate out of Africa by 200,000BCE and into other continents.
1.Which of the following statements is NOT true about the tools？()
A.The earliest tools were developed to aid early humans.
B.The earliest direct evidence of tool usage dates back to 2.5 million years ago.
C.The history of primitive tools is older than humankind.
D.Archaeologists have uncovered tools made more than two million years ago.
2.The turning point in the technological evolution of mankind is.()
A.the use of primitive tools by humanity ancestors
B.the adaptation of clothing from the fur and hides of hunted animals
C.the discovery and utilization of fire
D.the construction of temporary wood huts
3.The technological advances in clothing and shelter.()
A.were very important to humanity's progress
B.can be dated exactly
C.can be dated as early as 380,000BCE
D.helped people to move to any places they like
4.Which of the following can best replace the word "hides” in the third paragraph？()
A.leathers
B.hairs
C.places
D.skins
5.Which of the following is the best title for this passage？()
A.The discovery and utilization of fire.
B.The discovery of primitive tools.
C.The prehistory of technology.
D.The technological evolution of mankind.
A．They gave up poaching.
B．They killed more elephants to get the same quantity of ivory.
C．To them, game is over.
D．They realized it was illegal to slaughter elephants.
Yes, unfortunately, that's a common problem with books made from wood pulp.
I suppose to make paper from wood that you have to add a lot of chemicals and acids to make it turn white.
Exactly and it's the acid that eventually eats away the paper.
Oh, that actually make sense, but this book's not even 75 years old and I've seen books in museum that are hundreds of years old and they're in fine condition.
Well, you see, books have been made from wood pulp only since 1850's, before that they were made from materials mostly animals' skins or C, no chemicals were added.
It's a shame those older wood pulp books are going to fall apart some day. Is there anything that can be done to preserve them.
En, currently the only way to stop the books from decaying is to remove the binding and treat each page individually to remove the acid.
That doesn't sound very economical.
No, it isn't. It's not practical to treat a large number of books with this process, so we only try to rescue the most valuable 1st edition books in our collection.
Well, thanks for the explanation. I'd better get back to my project.
Good luck, and I hope the old book hold long enough for you to finish it.
(31)
A．The early history of bookbinding.
B．How old books become valuable.
C．Economical ways to protect old books,
D．Why some books deteriorate.
The population which is top-heavy with older people poses a problem to ______.
A．the government
B．the economy
C．the workforce
D．All of the above.
According to passage, which of the foUowing are governments most worried about？
A．The diseases and disability of older people.
B．The longer life and good health of people.
C．The loss of taxes on older people.
D．The increasing respect for older people.
Which is the best title for this passage？
A．The Change of Colors for Animals and Pests.
B．Colors of Different Animals and Pests.
C．The Main Use of Colors for Animals and Pests.
D．Some Animals and Pests.
The population which is top-heavy with older people poses a problem to ______.
A．the government
B．the economy
C．the workforce
D．ail of the above
M: Yes. Unfortunately, that's a common problem with books made from wood pulp.
W: I suppose that to make paper from wood you have to add a lot of chemicals and acids to make it turn white.
M: Exactly, and it's the acid that eventually cat's away the paper.
W: Oh, that actually makes sense, but this book's not even 75 years old and I've seen books in museum that are hundreds of years old and they're in fine condition.
M: Well, you see, books have been made from wood pulp only since the 1850s, before that they were made from materials mostly animals' skins, and no chemicals were added.
W: It's a shame those older wood pulp books are going to fall apart some day. Is there anything that can be done to preserve them？
M: En, currently the only way to stop the books from decaying is to remove the binding and treat each page individually to remove the acid.
W: That doesn't sound very economical.
M: No, it isn't. It's not practical to treat a large number of book's with this process, so we only try to rescue the most valuable edition books in our collection.
W: Well, thanks for the explanation. I'd better get back to my project.
M: Good luck and I hope the old book will bold long enough for you to finish it.
(23)
A．The early history of bookbinding.
B．How old books become valuable.
C．Economical ways to protect old books.
D．Why some books decay.
A．The man's pet.
B．The man's older brother.
C．The man's mother.
D．The man's younger brother.
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