[单项选择]

Avalanche (雪崩) and Its Safety

An avalanche is a sudden and rapid flow of snow, often mixed with air and water, down a mountainside. Avalanches are (51) the biggest dangers in the mountains for both life and property.
All avalanches are caused by an overburden of material, typically snowpack (积雪场), that is too massive and unstable for the slope (52) supports it. Determining the critical load, the amount of over-burden which is (53) to cause an avalanche, (54) a complex task involving the evaluation of a number of factors.
Terrain slopes flatter than 25 degrees or steeper than 60 degrees typically have a low (55) of avalanche. Snow does not (56) significantly on steep slopes; also, snow does not (57) easily on fiat slopes. Human-triggered (激发) avalanches have the greatest incidence (发生率) when the snow’s angle of rest is (58) 35 and 45 degrees; the critical ang
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[单项选择]
An avalanche is a sudden and rapid flow of snow, often mixed with air and water, down a mountainside. Avalanches are (51) the biggest dangers in the mountains for both life and property.
All avalanches are caused by an overburden of material, typically snowpack (积雪场), that is too massive and unstable for the slope (52) supports it. Determining the critical load, the amount of over-burden which is (53) to cause an avalanche, (54) a complex task involving the evaluation of a number of factors.
Terrain slopes flatter than 25 degrees or steeper than 60 degrees typically have a low (55) of avalanche. Snow does not (56) significantly on steep slopes; also, snow does not (57) easily on fiat slopes. Human-triggered (激发) avalanches have the greatest incidence (发生率) when the snow’s angle of rest is (58) 35 and 45 degrees; the critical ang
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[简答题]Title: Avalanche 雪崩 Question types： Summary; Matching; Labelling a Diagram 大致内容 关于雪崩，说了雪崩的研究机构，雪崩产生的原因，一是自然原因，二是人为原因，以及如何应对雪崩造成的危害和对它的预测等。 Matching为段落信息配对题，包括雪崩可能与人类的活动有关/雪崩可能与atmosphere有关/收集雪做测试/system怎么spread/雪崩很难预测/防范措施降低危害等。 Labelling a Diagram为一山体滑坡的图，35degrees Treeline, tree, anchor, windward, weaker layer, snowpack, breaks away...

[简答题]The UK has long prided itself on its road safety standards. Casualty figures are low compared with most other industrialized countries. But this positive record, coupled with the fact that the international trend continues downwards, is also why the first increase in road deaths for almost a decade should be a cause for concern. A breakdown of the 2010—11 figures shows where that concern could most usefully be directed. Deaths among drivers and passengers were up 6 per cent, with rural roads accounting for more of the rise than urban areas, and a disproportionate number of fatal accidents involving drivers under 24. The relatively high accident rate on rural roads has brought calls for a new speed limit in country areas of 40 mph. That is worth considering. There are many roads where the lack of a limit implicitly allows drivers to travel at 60 mph, even where the conditions should dictate otherwise. Arguments about the expense of new signs could be met by the intro

[填空题]The apartments with safety features designed for seniors were limited to people with ______.