题目内容
You can tell a lot about people by looking at their hair — not just whether they brush, spray or blow-dry. Scientists have found a way to use hair to figure out where a person is from and where that person has been. The finding could help solve crimes, among other useful applications.
Water is central to the new technique. The liquid makes up more than half an adult human’s body weight. Our bodies break water down into hydrogen(氢) and oxygen. Atoms of these two elements end up in our tissues, fingernails, and hair.
But not all water is the same. Hydrogen and oxygen atoms can vary in how much they weigh. In the case of hydrogen, for example, there are three types according to their weights. Each type is called a hydrogen isotope(同位素). And depending on where you live, tap water contains different isotopes.
Can hair record this information? That’s what James R. Ehleringer, an environmental chemist at the University of Utah, wondered. To find it out, he and his colleagues collected hair from hair stylists in 65 cities across the United States. Even though people drink a lot of bottled water these days, the researchers have found that people’s hair has the same isotopes as found in local tap water. That’s probably because people usually cook their food with the local water.
Authorities can now use the information to analyze hair samples from criminals or crime victims and narrow their search for clues. For example, one hair sample used in Ehleringer’s study came from a man who had moved from San Francisco to Salt Lake City. As his hair grew, it reflected his change in location.
1.What do we know about the hydrogen isotopes according to Paragraph 3?
A. They are classified by size.
B. Each type of them differs in weight.
C. They can improve the quality of tap water.
D. Some of them cannot combine with oxygen.
2.Why is it possible to know where people are from by analyzing their hair?
A. People use the same bottled water.
B. People wash their hair in different ways.
C. People’s hair is affected by the weather of the places they stay.
D. People’s hair indicates the type of water in the places they stay.
3.The last paragraph is mainly to show _______.
A. how to recognize criminals B. how to collect hair samples
C. the usefulness of hair analysis D. the process of Ehleringer’s study
4.Which of the following can be the best title for the passage?
A. Water composition B. Change your hair
C. Hair detectives D. No way out
冲刺100分1号卷系列答案Like learning disabilities，behavior disorders are hard to diagnose．There are no physical symptoms in the body that are observable or measurable．Behavior disorders are therefore identified by observing behavior patterns in the child over a period of time．If a child displays some of the following behaviors，he may be labeled with a behavior disorder：
◆Aggression and cruelty to people and animals．
◆Destruction of property-defacing or damaging things．
◆Little sympathy and concern for others．
◆Takes no responsibility for behavior．Also lies，cheats and steals easily．
◆Disregards （无视）rules and regulations．
In addition to these general symptoms of a behavior disorder，there are other symptoms characteristic of more specific behavior disorders such as ADHD-this is the inattentive，can't-sit-still behavior．The attention can't last long and the behavior is impulsive at times．The child also seems quite distracted and forgetful．
Behavior disorders come from brain injury，child abuse，and shock，etc．There have also been indications that it could be a genetic disorder．The behavior therefore is an involuntary response to these experiences and the child should not be blamed for his behavior．Since the child has problems controlling his behavior，it stands to reason that his performance in school will be affected．A child with a behavior disorder will feel bad about himself and that low self-esteem will be further worsened by the adults around him who do not treat his condition with understanding and willingness to help．
Behavior disorders are best dealt with by behavior and psychological treatments．But，as with learning disabilities，accurate diagnosis is important and this must be over a length of time．It is also important in trying to modify the behavior to be clear about what is the behavior you are expecting．Make sure it is a rational expectation．For example，expecting a three-year-old to sit quietly through a long church service may not be reasonable，or demandi ng that a six-year-old does extra home work after a long day of school and extra curricular activities may be stretching the child's concentration and attention too far．Since some behavior disorders result from shocking and upsetting life experiences or brain injury，treatments should include helping the child to resolve and heal emotionally from the experience．The behavior could be corrected through emotional healing．In other words，when a human being is emotionally healthy，that is，can be aware of his intelligence and enthusiasm for life and his loving connectedness to other human beings，he automatically"behaves"rationally．
Title：Behaviour Disorders
| Passage outline | Supporting details |
| （68）Details of a behaviour disorder | A person may be considered to have a behaviour disorder when he behaves apparently （69）differentlyfrom others． |
| Symptoms of a behavior disorder | Being（70）aggressiveand showing no mercy to animals and other people Tending to do damage to things around him Having little sympathy or concern for others Failing to（71）answerfor what he has done and not being honest Lacking the awareness of（72）obeying/observingrules and regulations Having difficulty concentrating on something for long |
| Factors （73）resultingin behaviour isorders | Some outside forces may lead to a behaviour disorder． A genetic disorder giving rise to a behaviour disorder has also been found． |
| （74）waysto deal with behaviour disorders | Behaviour treatment：diagnosing such a disorder （75）accuratelyand modifying the disordered behaviour in a rational way． Psychological treatment：attaching importance to improving the patient's emotional （76）health，thus，developing a proper self-esteem． |
| Conclusion | A behaviour disorder isn't nearly （77）easyto diagnose from physical symptoms，but it can be dealt with in behaviour and psychological ways． |
| A． | It never occurred to | B． | That never occurred to | ||
| C． | It never occurred with | D． | That never occurred for |
-________．Is there anyone so particular like you？（ ）
| A． | Take it or leave it | B． | Can't complain too much | ||
| C． | Go ahead | D． | Cheer up |