（二）   66  Scientists and experts have proved the uniqueness of finger-prints and discovered that no exactly similar pattern is passed on from parents to children, though nobody knows why this is the case.
The ridge （隆起） structure on a person's fingers does not change with growth and is not affected by surface injuries. Burns, cuts and other damage to the outer part of the skin will be replaced in time by new one, which bears a reproduction of the original pattern.  67   Some criminals make use of this fact to remove their own finger-prints but this is a dangerous and rare step to take.
Finger-prints can be made very easily with printer's ink. They can by be recorded easily.  68  Because of the simplicity and economy of this system, finger-prints have often been used as a method of solving criminal case. A suspected man may deny a charge but this may be in vain. 69  . When a suspect leaves finger-prints behind at the scene of a crime, they are difficult to detect with the naked eye.   70  Some of the marks found are incomplete but identification is possible if a print of a quarter of an inch square can be obtained.

A．Special techniques are used to "develop" them.

B．A fingerprint is an impression of the friction ridges of all part of the finger.

C．It is only when the inner skin is injured that the arrangement will be destroyed.

D．With special methods, identification can be achieved successfully within a short time.

E. A latent print is the chance reproduction of the friction ridges deposited on the surface of an item.
F. His finger-prints can prove who he is even if his appearance has been changed by age or accident.
G. Every human being has a unique arrangement of the skin on his fingers and this arrangement is unchangeable.

根据短文内容，选择能填入空白出的最佳选项，选项中有两项多余，将答案写在答卷纸上（共五小题10分）

1   Scientists and experts have proved the uniqueness of finger-prints and discovered that no exactly similar pattern is passed on from parents to children, though nobody knows why this is the case．    The ridge （隆起） structure on a person's fingers does not change with growth and is not affected by surface injuries．Burns, cuts and other damage to the outer part of the skin will be replaced in time by new one, which bears a reproduction of the original pattern．

2_____   Some criminals make use of this fact to remove their own finger-prints but this is a dangerous and rare step to take．     Finger-prints can be made very easily with printer's ink．They can be recorded easily．

3_____  Because of the simplicity and economy of this system, finger-prints have often been used as a method of solving criminal case．A suspected man may deny a charge but this may be in vain．

4_______When a suspect leaves finger-prints behind at the scene of a crime, they are difficult to detect with the naked eye．

5_____ Some of the marks found are incomplete but identification is possible if a print of a quarter of an inch square can be obtained．      

A．Special techniques are used to "develop" them． 

B．A fingerprint is an impression of the friction ridges of all part of he finger．    

C．It is only when the inner skin is injured that the arrangement   will be destroyed． 

D．With special methods, identification can be achieved successfully within a short time．

E．A latent print is the chance reproduction of the friction ridges deposited on the surface of an item．

F．His finger-prints can prove who he is even if his appearance has been changed by age or accident．

G．Every human being has a unique arrangement of the skin on his   fingers and this arrangement is unchangeable

 

 

Experience the newly opened Grand Canyon(大峡谷)West Skywalk in Colorado.Departing from Grand Canyon’s South Rim by Airplane to Grand Canyon’s West Rim,you will land and take a ground tour to the Skywalk!Walk on air for 70 feet over the edge of Grand Canyon West.

This Skywalk has been open since March 28,2007.Daily visitorship to the Skywalk has been over 4000 people.Please be patient to enjoy your moment on the Skywalk.

After you have experienced the one and only Grand Canyon Skywalk Glass Bridge,you will return to the Grand Canyon West Airport and take your Airplane for a flight back to the South Rim of the Canyon.This is a tour never to be forgotten as you will have walked on air over the Grand Canyon.

Tour Itinerary(行程)

Tour Duration	5.7 Hour	The Ground Canyon Adventure Skywalk
Flight from Grand Canyon South Rim to Grand Canyon West	1 Hour	Experience a bird’s-eye view of the Grand Canyon as you make your way to Grand Canyon West.
Light Lunch at Guano Point at Grand Canyon West	2 Hours	You will be taken by bus to Guano Point with breathtaking views of the western part of the Grand Canyon where the Colorado River makes its way into Lake Mead.Every table for lunch has a view.
Walk on the World Famous Skywalk	1.5 Hour s	Finally you will board your bus to Eagle Point,home of the Grand Canyon Skywalk.Now it is time for you to walk on air for 70 feet over the Grand Canyon.
Fight Back to Grand Canyon South Rim	1.2 Hours	After time on the Skywalk,you will return to the Grand Canyon West Airport and return to Grand Canyon South Rim in time for dinner and sunset.

 

1.This advertisement is for_______.

A.Grand Canyon West                     B.Grand Canyon South

C.Grand Canyon                          D.the Skywalk

2.The package fee does NOT cover the cost of_______.

3.The Grand Canyon Skywalk Bridge is made of glass because_______.

A.it looks stronger                         B.it is cheaper to build

C.it looks more beautiful                       D.it gives you a better view

4.According to the Tour Itinerary,the route is_______.

A.South Rim→Guano Point→West Airport→Eagle Point→West Airport→South Rim

B.South Rim→West Airport→Guano Point→Eagle Point→West Airport→South Rim

C.South Rim→West Airport→Eagle Point→Guano Point→West Airport→South Rim

South Rim→West Airport→Eagle Point→West Airport→Guano Point→South Rim

 

 

We once had a poster competition in our fifth grade art class.

 “You could win prizes，’’our teacher told US as she wrote the poster information on the blackboard. She passed out sheets of construction paper while continuing，“The first prize is ten dollars. You just have to make sure that the words on the blackboard appear somewhere on your poster. ”

We studied the board critically. Some of US looked with one eye and held up certain colors against the blackboard，rocking the sheets to the fight or left while we conjured up our designs. Others twisted their hair around their fingers or chewed their erasers while deep in thought. We had plans for that ten—dollar grand prize，each and every one of US. I'm going to spend mine on candies，one hopeful would announce，while another practiced looking serious，wise and rich.

Everyone in the class made a poster. Some of us used parts of those fancy paper napkins， while others used nothing but colored construction paper. Some of US used big designs，and some of us preferred to gather our art tidily down in one comer of our poster and let the space draw the viewer's attention to it. Some of US would wander past the good students’ desks and then return to our own projects with a growing sense of hopelessness. It was yet another grown-up trick of the soil they seemed especially fond of。making all of US believe we had a fair chance，and then always—always—rewarding the same old winners.

I believe I drew a sailboat，but I can’t say that with any certainty. I made it. I admired it. I determined it to be the very best of all of the posters I had seen，and then I turned it in.

Minutes passed.

No one came along to give me the grand prize，and then someone distracted me，and I probably never would have thought about that poster again.

I was still sitting at my desk，thinking，What poster? When the teacher gave me an envelope with a ten-dollar bill in it and everyone in the class applauded for me.

1.What was the teacher's requirement for the poster?

A. It must appear in time.

B. It must be done in class.

C. It must be done on a construction sheet.

D. It must include the words on the blackboard.

2.The underlined phrase in paragraph 3 most probably means _____________.

A. formed an idea for

B. made an outline for

C. made some space for

D. chose some colors for

3.After the teacher’s words，all the students in the class _________.

A. 1ooked very serious

B. thought they would be rich

C. began to think about their designs

D. began to play games

4.After seeing the good students’ designs，some students _________.

A. 1oved their own designs more

B. thought they had a fair chance

C. put their own designs in a comer

D. thought they would not win the prize

5.We can infer from the passage that the author ______________.

A. enjoyed grown-up tricks very much

B. 1oved poster competitions very much

C. felt surprised to win the competition

D. became wise and rich after the competition

 

Birds that are half-asleep — with one brain hemisphere (半球) alert(警觉) and the other sleeping — control which side of the brain remains awake, according to a new study of sleeping ducks.

    Earlier studies have recorded half-brain sleep in a wide range of birds. The brain hemispheres take turns sinking into the sleep stage characterized by slow brain waves. The eye controlled by the sleeping hemisphere keeps shut, while the wakeful hemisphere’s eye stays open and alert. Birds also can sleep with both hemispheres resting at once.

    Decades of studies of bird groups led researchers to predict extra alertness in the end-of-the-row sleepers which tend to be attacked more easily. Sure enough, the end birds tended to watch carefully on the side away from their companions. Ducks in the inner spots showed no preference for gaze(注视) direction.

    Also, birds napping (打盹) at the end of the line depend on single-hemisphere sleep, rather than total relaxation, more often than inner ducks did. Turning 16 birds through the positions in a four-duck row, the researchers found that compared with 12 percent for birds in inner spots, outer birds half-asleep during some 32 percent of napping time.

    “We believe this is the first evidence for an animal behaviorally controlling sleep and wakefulness at the same time in different regions of the brain,” the researchers say.

    The results provide the best evidence for a long-standing assumption that single-hemisphere sleep developed over time as creatures scanned for enemies. The preference for opening an eye on the lookout side could be widespread, he predicts. He’s seen it in a pair of birds napping side-by-side in the zoo and in a single pet bird sleeping by a mirror. The mirror-side eye closed as if the reflection were a companion and the other eye stayed open.

    Useful as half-sleeping might be, it’s only been found in birds and such water animals as dolphins, whales, and seals. Perhaps keeping one side of the brain awake allows a sleeping animal to surface occasionally to avoid drowning.

    Studies of birds may offer unique insights into sleep. Jerome M. Siegel of the UCLA says he wonders if birds’ half-brain sleep “is just the tip of the iceberg.” He supposes that more examples may turn up when we take a closer look at other species.

1.According to the passage, birds often half sleep because ______.

    A. they have to watch out for possible attacks

    B. their brain hemispheres take turns to rest

    C. the two halves of their brain are differently organized

    D. they have to constantly keep an eye on their companions

2.What is implied about the example of a bird’s sleeping in front of a mirror?

    A. An imagined companion gives the bird a sense of security.

    B. Birds prefer to sleep in pairs for the sake of their security.

    C. The phenomenon of birds napping in pairs is widespread.

D. A single pet bird enjoys seeing its own reflection in the mirror.

3.It can be inferred that _______.

A. Birds never sleep with both hemispheres resting at once.

B. Inner ducks depend on single-hemisphere sleep, rather than total relaxation, as often as birds napping at the end of the line do

C. It is not the first time for scientists to research on birds’ half-brain sleep 

D. Birds hardly sleep without a companion

4.By saying “just the tip of the iceberg”, Siegel suggests that _______.

    A. half-brain sleep has something to do with icy weather

    B. the mystery of half-brain sleep is close to being solved

    C. most birds living in cold regions tend to be half sleepers

    D. half-brain sleep may exist among other species