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B) the basic structure of plants consists of roots, stem and leaves
C) different plants have different numbers=and shapes
D) woody plants are tree-like
21) Plants are not only used as a source of food .......
A) they take in water from the soil through their roots
B) the water also passes through the vascular rays till it reaches the center of the root
C) but also as a medicine
D) they transport vitamins, minerals and water up and down inside the plant
About 10 percent of people with schizophrenia commit suicide, and many others attempt
suicide. Once people develop schizophrenia, they generally suffer from the illness for the rest
of their lives. Even though there is no cure, treatment can help many people with schizophrenia
lead productive lives. Schizophrenia also carries an enormous cost to society. People with
schizophrenia occupy about one-third of all beds in psychiatric hospitals in the United States.
Furthermore, people with schizophrenia account for at least 10 percent of the homeless
population in the United States. The National Institute of Mental Health has estimated that
schizophrenia costs the United States tens of billions of dollars per year in direct treatment,
social services, and lost productivity.
22) There are so many schizophrenic people that..........
A) They develop schizophrenia at some time during their lives
B) women tend to experience the illness less severely
C) much less commonly, schizophrenia develops later in life
D) it usually develops slowly over months or years
23) According to the author schizophrenia is incurable ......
A) but people with schizophrenia can become productive when they are kept under
treatment
B) although women are just as likely as men to develop schizophrenia
C) it usually develops in late adolescence or early adulthood
D) because symptoms and functioning in people with schizophrenia tend to vary over time
24) Schizophrenia is said to be incurable, that is, ......
A) a variety of symptoms characterize schizophrenia
B) the illness may begin abruptly
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