Please delete my name from your list.
A:change
B:edit
C:omit
D:copy

It is absolutely vital that food supplies should be maintained.
A:preserved
B:kept
C:supported
D:upheld

Joe came to the window as the crowd chanted “Joe,Joe,Joe.”
A:.jumped
B: maintained
C: repeated
D: approached

共用题干
第二篇
DNA Fingerprinting
DNA is the genetic material found within the cell nuclei of all living things. In mammals（哺乳动物）
the strands of DNA are grouped into structures called chromosomes（染色体）.With the exception of identical
twins,the complete DNA of each individual is unique.
DNA fingerprinting is sometimes called DNA typing. It is a method of identification that compares bits
of DNA.A DAN fingerprint is constructed by first drawing out a DNA sample from body tissue or fluid such
as hair , blood，or saliva（唾液）.The sample is then segmented using enzymes（酶）,and the segments are
arranged by size.The segments are marked with probes and exposed on X-ray film,where they form a pat-
tern of black bars一the DNA fingerprint.If the DNA fingerprints produced from two different samples match,
the two samples probably came from the same person.
DNA fingerprinting was first developed as an identification technique in 1985.Originally used to detect
the presence of genetic diseases,it soon came to be used in criminal investigations and legal affairs.The first
criminal conviction based on DNA evidence in the United States occurred in 1988.In criminal investiga-
tions,DNA fingerprints derived from evidence collected at the crime scene are compared to the DNA finger-
prints of suspects.Generally,courts have accepted the reliability of DNA testing and admitted DNA test re-
sults into evidence.However,DNA fingerprinting is controversial in a number of areas:the accuracy of the
results,the cost of testing,and the possible misuse of the technique.
The accuracy of DNA fingerprinting has been challenged for several reasons. First,because DNA segments
rather than complete DNA strands are"fingerprinted";a DNA fingerprint may not be unique;large-scale
research to confirm the uniqueness of DNA fingerprinting.test results has not been conducted.In addition,
DNA fingerprinting is often done in private laboratories that may not follow uniform testing standards and
quality controls.Also,since human beings must interpret the test,human error could lead to false results.
DNA fingerprinting is expensive.Suspects who are unable to provide their own DNA to experts may not
be able to successfully defend themselves against charges based on DNA evidence.
Widespread use of DNA testing for identification purposes may lead to the establishment of a DNA
fingerprint database.
It can be inferred from Paragraph 5 that DNA fingerprinting________.
A:is costly to the police
B:could be a social issue
C:is the only way to prove innocence
D:has been a profitable business

共用题干
Scientists Develop Ways of Detecting Heart Attack
German researchers have come up with a new generation of defibrillators（除颤器）and early-warning
software aimed at offering heart patients greater________ (51)from sudden death from cardiac arrest（心脏
停搏）.
In Germany alone,around 100,000 people die annually________(52)a result of cardiac arrest and
many of these cases are caused by disruption to the heart's rhythm.Those most at________(53)are pa-
tients who have already suffered a heart attack,and for years the use of defibrillators has proved useful in
________(54)life-threatening disruptions to heart rhythms and correcting them automatically by intervening
within seconds.These devices________(55)on a range of functions,such as that of pacemaker（起
搏器）.
Heart specialists at Freiburg's University Clinic have now achieved a breakthrough with an implanted
defibrillator________(56 ) of generating a six-channel electrocardiogram ( EGG，心电图）within the body.
This integrated system allows _________( 57 ) diagnosis of severe blood-flow problems and a pending（即将发
生的）heart attack. It will be implanted in _________( 58 ) for the first time this year. Meanwhile , research-
ers at the Fraunhofer Institute for Applied Mathematics in Kaiserslautern have developed new computer soft-
ware that________(59)the evaluation of EGG data more precise.
The overwhelming majority of patients at risk will not have an implanted defibrillator and must for this
________(60)undergo regular EGGs."Many of the current programs only take into________(61)a line-
ar correlation of the data. We are,however,making use in a non-linear process________(62)reveals the
chaotic patterns of heart beats as an open and complex system,"Hagen Knaf says,"In this way changes in
the heart________(63)over time can be monitored and individual variations in patients taken into ac-
count."An old study of EGG data,based upon 600 patients who had________(64)a subsequent heart
attack,enabled the researchers to compare risks and to show that the new software evaluates the________
(65)considerably better.
_________(64)
A:suffered
B:launched
C:avoided
D:started

Traffic reaches its rush hour between 8:00 and 9:00 in the morning.
A: border
B: goal
C: peak
D: level