AP 2012-04-29_在线英语听力室_免费在线英语听力学习网站

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1. Agricultural officials in California are assuring consumers the food supply is safe after discovering a cow with BSE, commonly known as mad cow disease. Officials say the cow developed the disease through a natural mutation¹ and not from eating infected feed.

2. Mitt² Romney swept the five Republican presidential primaries held in the Northeast Tuesday. Romney focused on the general election in his victory speech, saying "a better America begins tonight."

3. Homeland Security Secretary Janet Napolitano goes before a Senate panel Wednesday to answer questions about the Secret Service prostitution scandal. Nine Secret Service members have been forced out while one lost his security clearance³, two were cleared of wrongdoing. A dozen military personnel have been implicated⁴.

4. And News Corp Chairman Rupert Murdoch testified to a British investigative panel about the phone hacking⁵ scandal that brought down one of his tabloids⁶.

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1 mutation
n.变化，变异，转变
参考例句：
People who have this mutation need less sleep than others.有这种突变的人需要的睡眠比其他人少。 So far the discussion has centered entirely around mutation in the strict sense.到目前为止，严格来讲，讨论完全集中于围绕突变问题上。

2 mitt
n.棒球手套，拳击手套，无指手套；vt.铐住，握手
参考例句：
I gave him a baseball mitt for his birthday.为祝贺他的生日，我送给他一只棒球手套。 Tom squeezed a mitt and a glove into the bag.汤姆把棒球手套和手套都塞进袋子里。

3 clearance
n.净空；许可(证)；清算；清除，清理
参考例句：
There was a clearance of only ten centimetres between the two walls.两堵墙之间只有十厘米的空隙。 The ship sailed as soon as it got clearance. 那艘船一办好离港手续立刻启航了。

4 implicated
adj.密切关联的；牵涉其中的
参考例句：
These groups are very strongly implicated in the violence. 这些组织与这起暴力事件有着极大的关联。来自《简明英汉词典》 Having the stolen goods in his possession implicated him in the robbery. 因藏有赃物使他涉有偷盗的嫌疑。来自《现代汉英综合大词典》

5 hacking
n.非法访问计算机系统和数据库的活动
参考例句：
The patient with emphysema is hacking all day. 这个肺气肿病人整天不断地干咳。 We undertook the task of hacking our way through the jungle. 我们负责在丛林中开路。

6 tabloids
n.小报，通俗小报（版面通常比大报小一半，文章短，图片多，经常报道名人佚事）( tabloid的名词复数 )；药片
参考例句：
The story was on the front pages of all the tabloids. 所有小报都在头版报道了这件事。 The story made the front page in all the tabloids. 这件事成了所有小报的头版新闻。