单项选择题

Questions 9 and 10 are based on the following news. Which of the following statements about the disease is TRUE

A．It kills 60,000 people in Africa each year.
B．It is easy to diagnose but difficult to cure.
C．It spreads through air.
D．It can cause deat
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单项选择题
What do Dr. Ravitch’s basic principles of education center on
A．All children should have access to an education of high quality.
B．Accountability and choice are very effective means.
C．More public services should be ptivatized at a faster speed.
D．Physical education isn’t an essential part of high-quality education.
单项选择题
In the US, the rise of heroin production in Mexico in 2008 resulted in
A．lower heroin prices.
B．rapid grow of drug trade.
C．more diseases.
D．widespread drug activists.
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