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版权所有 翻印必究咨询热线:400-678-3456环球网校学员专用 第 5页 /共 NUMS5页 Avalanche and Its Safety雪崩和安全问题雪崩是雪掺杂着空气和水沿着山体突然迅猛地滑动造成的。雪崩是造成山区人们生命和财产安全的最大危险之一。所有雪崩都是由于物质的过度负荷造成,通常是积雪堆积过厚,很不稳固,超出了山坡面的承载能力。要确定山坡的临界承载量和可能造成突然雪崩
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第一篇A Life with BirdsFor nearly 17 years David Cope has worked as one of the Tower of London's yeoman warders, __1__ known to tourists as beefeaters David, 64, lives in a three-bedroomed flat right
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