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听力原文： This is Vaccination Week in the Americas. The Pan American Health Organization and officials from the United States, Mexico and Canada launched the campaign Monday. Public health officials say they hope to reach forty-four million children and adults throughout North, Central and South America. The children will be vaccinated against measles, polio, rubella and other diseases that can be prevented.
Officials say vaccines have greatly reduced child deaths and disability caused by preventable diseases in the Americas. This month marks the fiftieth anniversary of the Salk vaccine against polio. Today the Americas have been declared polio-free. Smallpox has been ended worldwide. And there has been progress against mea sles. Health officials in the Americas are also working to end another disease, rubella, through vaccination.
Eleven thousand babies are born each day in the United States. Public health officials say children should be vaccinated against twelve diseases before age two. But they say more than twenty percent of two-year-olds in the United States are not fully protected against these preventable diseases.
All thirty-five countries in North, Central and South America are members of the Pan American Health Organization. It is based in Washington. It was established in 1902 and represents the Americas in the World Health Organization.
The Vaccination Week campaign was launched ______.
听力原文： Algerian police, looking for three kidnapped French nationals, are searching vehicles at roadblocks in downtown Algiers. The van used in Sunday's kidnapping was found abandoned in the area. An Algerian police chief says the cap tires may still be alive. Seven foreigners have been killed over the last month by suspected Moslem extremists fighting to topple the government. France is urging families of French nationals in Algeria to come home
The kidnapping took place ______.
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某局域网通过两台路由器划分为3个子网，拓扑结构和地址分配如图6-3所示。为路由器R1的e0端口设置一条到达192.168.3.0/24网段的默认路由的配置语句是(49)。
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