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王老师:19139051760(拨打)
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第1题

What do we know about the black boxes from Air France Flight 447? A . There is still a good chance of their beina recov
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第2题

深筋膜又称固有筋膜 （2分） 正确 错误
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第3题

Why did the Federal Aviation Authority require the black boxes be painted orangeyellow? A . To distinquish them from th
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第4题

why was the black box redesigned in 1965? A . New materials became available by that time B . Too much space was neede
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