文章列表

• 1.英语听力：自然百科 探索世界奥秘之FBI(揭密联邦调查局)Unit11
• Thanks to Boylan's drawing, within 6 weeks, police follow a trail of evidence to this man, Richard Allen Davis, who looks nothing like the original po...
• 2.英语听力：自然百科 探索世界奥秘之FBI(揭密联邦调查局)Unit10
• Boylan interviews the girls separately, probing their memory for clues. She does not interrogate them, but engages them in casual conversation. Her qu...
• 3.英语听力：自然百科 探索世界奥秘之FBI(揭密联邦调查局)Unit9
• Boylan believes that a witness's memory is as crucial to a case as any physical evidence. What I would ultimately want would be for police to really p...
• 4.英语听力：自然百科 探索世界奥秘之FBI(揭密联邦调查局)Unit8
• The FBI agents race in from every direction. Thanks to the FBI's use of a secret informant, the bombing conspiracy is foiled and the suspects are put ...
• 5.英语听力：自然百科 探索世界奥秘之FBI(揭密联邦调查局)Unit7
• Despite the risk, Spence allows the FBI to rig a video camera in the dashboard of his truck. Here, the hidden camera records one of the suspects descr...
• 6.英语听力：自然百科 探索世界奥秘之FBI(揭密联邦调查局)Unit6
• How does the bureau use informants to bring dangerous criminals to justice? They have several top-secret strategies which we are about to reveal. FBI ...
• 7.英语听力：自然百科 探索世界奥秘之FBI(揭密联邦调查局)Unit5
• If threw these nails out into the crowd, extremely deadly shrapnel. Once the FBI knows what materials were used to build the bomb and how it was conce...
• 8.英语听力：自然百科 探索世界奥秘之FBI(揭密联邦调查局)Unit4
• Unlike the fertilizer bomb used in Oklahoma City, device analysis reveals that the New Jersey bomb is made from common household items. The problem is...
• 9.英语听力：自然百科 探索世界奥秘之FBI(揭密联邦调查局)Unit3
• Back at the explosives lab, examiners use a high-tech instrument called a Raman spectrometer, a device that determines if a package contains explosive...
• 10.英语听力：自然百科 探索世界奥秘之FBI(揭密联邦调查局)Unit2
• Atlanta, Georgia, a terrorist bomb explodes in Centennial Olympic Park, killing one woman and injuring hundreds. North Caldwell, New Jersey, an advert...