题目内容
Charter Schools
American public education has changed in recent years. One change is that increasing numbers of American parents and teachers are starting independent public schools called charter schools.
In 1991, there were(51)charter schools in the United States. Today, more than 2,300 charter schools(52)in 34 states and the District of Columbia2. 575,000 students(53)these schools. The students are from 5 years(54)age through 18 or older.
A charter school is created by groups of parents, teachers and community members. It is similar(55)some ways to a traditional public school. It receives tax money to operate just as(56)public schools do. The amount it receives depends(57)the number of students. The charter school must prove(58)local or state governments that its students are learning. These governments provide the school(59)the agreement, or charter that permits it to operate.
Unlike a traditional public school,(60), the charter school does not have to obey most laws governing public schools. Local, state or federal governments cannot tell it what to teach.
Each school can choose its own goals and decide the ways it wants to(61)those goals. Class sizes usually are smaller than in many traditional public schools. Many students and parents say teachers in charter schools can be more creative.
However, state education agencies3, local education-governing committees and unions often(62)charter schools. They say these schools may receive money badly needed by traditional public schools. Experts say some charter schools are doing well while others are struggling.
Congress provided 200 million dollars for establishing charter schools in the 2002 federal budget.(63), often the schools say they lack enough money for their programs. Many also lack needed space.
(64), many of the 36 charter schools in the District of Columbia hold classes in crowded buildings. These schools have almost 11,000 students. District officials say they have provided 14 former school buildings(65)charter education. Yet, charter-school supporters say officials should try harder to find more space.
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From the last paragraph we may infer that one of the effective measures suggested by Ludnik to prevent children from being obese would be
How could we prove that the drugs have wiped out the remaining viruses？
New Attempts to Eradicate AIDS Virus
A high-profile attempt to eradicate the AIDS virus in a few patients continues to show promise.
But researchers won't know for a year or more whether it will work, scientist David Ho told journalists here Wednesday for the Fourth Conference in Viruses and Infections.
"This is a study that's in progress," says Ho, head of the Aaron Diamond AIDS Research Center, New York.
The study involves 20 people who started combinations of anti-HIV drugs very early in the course of the disease, within 90 days of their infections. They've been treated for up to 18 months. Four others have dropped out because of side effects or problems complying with the exacting drug system.
The drugs have knocked the AIDS virus down to undetectable levels in the blood of all remaining patients, s And, in the latest development6, scientists have now tested lymph nodes and semen from a few patients and found no virus reproducing there, Ho says. "Bear in mind that？ undetectable does not equal absent," Ho says.
Ho has calculated that the drugs should be able to wipe out remaining viruses -- at least from known reservoirs throughout the body -- in two to three years. But the only way to prove eradication would be to stop the drugs and see if the virus comes back8. On Wednesday, Ho said he wouldn't ask any patient to consider that step before 2years of treatment.
And he emphasized that he is not urging widespread adoption of such early, aggressive treatment outside of trials9. No one knows the long-term risks.
But other scientists are looking at similar experiments. A federally funded study will put 300 patients on triple-drug treatments and then see if some responding well after six months can continue to suppress the virus on just one or two drugs, says researcher Douglas Richman of the University of California, San Diego. Some patients in that study also may be offered the chance to stop therapy after 18 months or more, he says.
According to the passage, the attempt to eradicate the AIDS virus
治安工作社会化是人民群众在社会治安方面当家作主的体现，是人民群众广泛参与治安管理的一个必然趋势。()
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