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[单项选择]In the 1950s, the development of antipsychotic drugs called neuroleptics(抑制精神病药物)radically changed the clinical outlook for patients in mental institutions who had previously been considered hopelessly psychotic. Daily medication controlled delusions and made psychotherapy possible. Many who otherwise might never have left institutions returned to society. Now physicians have learned that there is a price to be paid for these benefits. Approximately 10 to 15 percent of patients who undergo long-term treatment with antipsychotic drugs develop a cluster of symptoms called tardive dyskinesia(迟发性运动障碍 ), the most common symptoms of which are involuntary repetitive movement of the tongue, mouth, and face, and sometimes the limbs and trunk.
Neuroleptic drugs interfere with the action of dopamine (多巴胺), an important neurotransmitter in the brain, by binding to the dopamine receptors of nerve cells, and dopamine is a prime suspect in the pathophysiology of schizophrenia. Large doses of dru
A. suppressing the production of dopamine in the brain
B. blocking the nerve impulses transmitted to the muscles
C. preventing the absorption of dopamine by brain cells
D. creating a hypersensitivity to dopamine
[填空题]S3. Rock music which originated in the 1950s challenged ______.
[填空题]By the 1950s many American families owned television sets. During television’s first 20 years, deaf people missed most of the fun. They could not hear what was being said and had to guess. Deaf people who watched television liked sports and action shows, but they were disappointed with other programs. If there was a lot of dialogue, deaf viewers couldn’t follow the plot. Even the most skilled lip-readers could only catch part of the talking. This frustrated many deaf people.
In the late 1960s, a man started experimenting. Malcom Norwood thought that deaf people could enjoy television programs, too. He wanted to develop captions for the programs. Norwood worked for the federal government’s Media Services and Captioned Films Division at the Bureau of Education of the Handicapped.
Norwood surveyed many hearing Americans. He wanted to see how they felt about seeing captions on the television screen. Too many people were against the idea. Norwood realized he had to develop ano
[填空题]
Segregation in Education
Until the 1950s, the equal
(1) provided by the 14th Americans of different origins. In 1896, the Supreme Court ruled that "segregation by race did not necessarily imply racial
(2) thus resulting the continuation of segregated schooling.
I. In 1954, the Supreme Court ruled: States had to provide equal educational opportunities to all students and viewed segregated schooling as "
(3) unequal"
II. In the late 1960s and early 1970s, the United States started to eliminate segregated schools.
1) Desegregation processes instituted through
(4) busing.
2) Many white parents’ choosing to flee the inner city or enrolled their children in
(5) schools.
3) Some African -Americans’ leaving their
(6) III. In recent years, (7) plans have been made to deal with the si