The outbreak of swine flu that was first detected in Mexico was declared a global epidemic on June 11, 2009. It is the first wor

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问题     The outbreak of swine flu that was first detected in Mexico was declared a global epidemic on June 11, 2009. It is the first worldwide epidemic【C1】________by the World Health Organization in 41 years.
    The heightened alert【C2】________an emergency meeting with flu experts in Geneva that convened after a sharp rise in cases in Australia, and rising【C3】________in Britain, Japan, Chile and elsewhere.
    But the epidemic is "【C4】________" in severity, according to Margaret Chan, the organization’s director general,【C5】________the overwhelming majority of patients experiencing only mild symptoms and a full recovery, often in the【C6】________of any medical treatment.
    The outbreak came to global【C7】________in late April 2009, when Mexican authorities noticed an unusually large number of hospitalizations and deaths【C8】________healthy adults. As much of Mexico City shut down at the height of a panic, cases began to【C9】________in New York City, the southwestern United States and around the world.
    In the United States, new cases seemed to fade【C10】________warmer weather arrived. But in late September 2009, officials reported there was【C11】________flu activity in almost every state and that virtually all the【C12】________ tested are the new swine flu, also known as (A) H1N1, not seasonal flu. In the U.S., it has【C13】________more than one million people, and caused more than 600 deaths and more than 6,000 hospitalizations.
    Federal health officials【C14】________Tamiflu for children from the national stockpile and began【C15】________ orders from the states for the new swine flu vaccine. The new vaccine, which is different from the annual flu vaccine, is【C16】________ahead of expectations. More than three million doses were to be made available in early October 2009, though most of those【C17】________doses were of the FluMist nasal spray type, which is not 【C18】________for pregnant women, people over 50 or those with breathing difficulties, heart disease or several other【C19】________. But it was still possible to vaccinate people in other high-risk group: health care workers, people【C20】________infants and healthy young people.
【C12】

选项 A、categories
B、examples
C、patterns
D、samples

答案D

解析 本题考查名词辨析。根据原文信息,本名词实际是一个医学中常用的术语,答案为D项samples(样本),samples tested就是被检测的样本。其他选项例如A项categories(种类)、B项examples(例子)、C项patterns(模式)均不能表达样本、样品的意思。
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