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Adult butterflies use their senses of si...

Adult butterflies use their senses of sight, touch, hearing, smell, and taste to survive in the world, find food and mates, lay eggs in an appropriate place, migrate, and avoid hungry predators.

Sight

Butterflies have large, compound (multifaceted) eyes, which allow them to see in all directions without turning their heads. Like most insects, butterflies are very nearsighted, so they are more attracted to a large stand of flowers rather than individual plants. Butterflies do not "see" colors such as red, green, and yellow, but sense polarized(偏振的) light, which indicates the direction the sun is shining, as well as ultraviolet light, which is present on many flowers and guides butterflies to nectar (花蜜)sources.

Smell

Butterflies have a very well-developed sense of smell, but it's not in their nose (since they don't have one). Sense receptors located in their antennae, feet, and many other parts of the body help butterflies find food (usually flower nectar), and mates (the female smells the male's pheromones).

Taste

Butterfly's feet have sense organs that can taste the sugar in nectar, letting the butterfly know if something is good to eat or not. Some females also taste host plants in order to find appropriate places to lay their eggs. Adult butterflies and moths feed using a proboscis, a long, coiled tube. Butterflies force blood into the tube to straighten it out, allowing them to feed. Butterflies get all their food from this tube.

Hearing

Butterflies don't have ears. Instead they "hear" sounds through their wings by sensing changes in sound vibrations.

Butterflies may possess senses we don't even know about yet because their anatomy is very different than ours, and therefore difficult to understand when perceived through our own human senses.

1.From the passage we can know that butterflies can see_____

  A. thing behind them               B. thing in the distance

  C. most bright colors               D. flower nectar from a distance

2. Butterflies can easily find food resources by using their______.

A. sense organs of sight and smell     B. sense organs of sight and taste

C. sense organs of smell and hearing   D. sense organs of smell and taste

3. How do butterflies feed themselves?

  A. by using their feet                B. by using a tube.

  C. by using sense receptors           D. by using their wings.

4.What is the passage mainly about?

  A. The food sources of butterflies.     B. The habits of butterflies.

  C. The unusual body of butterflies.     D. the sense of butterflies.

 

 

1.A2.A3.B4.D 【解析】略
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In the long discussion of water on the Moon, a new study contradicts(与……相矛盾)) some recent reports that say the Moon had water at the time of its formation. A group of researchers reported in the journal Science that when the Moon was created, some 4.5 billion years ago, there was not much hydrogen(氢气) on it, and therefore no water.

The researchers surveyed and evaluated this by analyzing chlorine isotopes(氯同位素) found in lunar rock samples from Apollo missions. The range of chlorine isotopes in lunar samples was 25 times that found in samples from Earth.

If the Moon had significant levels of hydrogen, as Earth did, this range would have been far less, said Zachary D Sharp, a scientist in the Department of Earth and Planetary Sciences at the University of new Mexico and the study’s lead authour.

The chlorine would have stuck together with hydrogen, forming compounds like hydrogen chloride, and escaped from the Moon’s surface, he said. The abundance of chlorine indicates a lack of hydrogen and water.

“ The amount of water on the Moon was too low for life to possibly have existed there,” he said.

Most scientists believe the Moon was formed when a large object stuck Earth, breaking off a chunk(a vast piece) that has since orbited Earth.

On Earth, goes one theory, water was released as steam form molten basalts(玄武岩) over time, eventually forming bodies of water.

“An understading of whether the Moon was dry or wet will help us understand how water appeared on Earth,” Dr Sharp said.

1. A new study indicates that _____ on the moorn.

   A. there is plenty of water              B. water is unlikely to exist

   C. water existed in the past             D. there is a little water now

2. The author would like to tell us ______ through the sixth paragraph.

  A. why there is no water on the Moon     B. how the Moon was formed 

  C. when the Earth struck the Moon       D. where the Moon orbited

3.  Which is NOT true according to the passage?

  A. Zachary D. Sharp, a scientist of New Mexico was in charge of the new study.

  B. Chlorine isotopes in lunar samples are 25 time larger than those on the Earth.

  C. The more aboundant chloride, the shorter hydrogen and water.

  D. The new study is benificial to understand how water appeared on Earth.

4. What can we learn from the passage?

  A. There is enough water on the Earth.

  B. Hydrogen chloride easily escaped from the Moon’s surface.

  C. The Earth had significant levels of hydrogen.

  D. Water on the Earth is directly from molten basalts.

 

 

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They leap from helicopters or speeding boats, bringing aid to swimmers who get into trouble off Italy’s popular beaches.

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With millions flocking(人群) to Italy’s crowded beaches each summer, the Italian Coast Guard says it rescues about 3,000 people every year — and their dog helpers are credited with saving several lives.

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  A. Dogs to the Rescue                B. Dogs Are Good at Doggie Paddle

  C. The Wonderful Performance of Dogs  D. Dogs: Our Loyal Friends

2.What advantage do these life-dogs have over human lifeguards in a rescue?

  A. Dog can swim very fast                      B. Dogs can finish rescue work with ease.

  C. Dogs can finish the great work free of charge.    D. Dogs can easily be trained

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A. Any breed can be trained there.

  B. The ones who have the gift for swimming are welcomed.

  C. After a better training, the dogs can work alone.

  D. It is the only place for training dog lifeguards in the school.

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  A. Without the dog lifeguards, 3,000 people would lose their lives every year.

  B. The buautiful beaches attract millions of people every year.

  C. Dog lifeguards play an important part in a rescue.

  D. Italy is a famous place of interest.

 

 

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One morning more than thirty years ago, I entered the Track Kitchen, a restaurant where everyone from the humbles(卑微的) to the most powerful came for breakfast. I noticed an empty chair next to an elderly, unshaven man, who looked somewhat disheveled. He was wearing a worn-out hat and was alone. I asked if I might join him. He agreed quietly and I sat down to have my breakfast.

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1. What does the underlined word”disheveled’ mean?

  A. Unfriendly        B. Untidy.        C. Gentle.          D. Kind.

 

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  C. he intended to show his politeness     C. he would like to thank the old man

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  A. Proud.          B. Pitiful.          C, Surprised.      D. Regretful.

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  A. We should learn to be generous.         

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 C. People in high positions are not like what we expect.

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完形填空(共20小题;每小题1.5分,满分30分)

阅读下面短文,从短文后所给各题的四个选项(A、B、C和D)中,选出可以填入空白处的最佳选项,并在答题卡上将该项涂黑。

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2. A. eyes           B. hands               C. ears             D. arms

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4. A. failed          B. worked              C. died            D. retired

5. A. sorry           B. lucky               C. anxious         D. gloomy

6.A. encouraged      B. explained           C. persuaded        D. comforted

7. A. understand      B. remember           C. experience       D. enjoy

8. A. teaching        B. struggle             C. marriage         D. life

9.A. foolish         B. terrible              C. mysterious       D.wonderful

10. A. few            B. all                 C. some            D. none

11. A. loudly          B. nervously           C. bravely          D. bitterly

12. A. attempted       B. began              C. turned           D. went

13. A. as             B. because             C. before           D. until

14. A. comment       B. surprise             C. doubt            D. criticize

15. A. avoided        B. appreciated          C. imagined          D. considered

16. A. blamed        B. interviewed          C. married           D. employed

17.A. laugh          B. sigh                C. cry              D. complain

18. A. success        B. wonder              C.failure            D. lessons

19. A. peace          B. love                C. agreement        D. harmony

20.A.but            B. so                  C. however          D.although

 

 

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---- Would you please ______ the form for me?

   ------ _____________.

A. fill; It’s a pleasure                        B. fill in;  With pleasure

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