2017
职称英语《卫生
A级》模拟试题及答案
　　Anavalanche
isasudden
andrapid
flow
ofsnow,
often
mixed
with
airandwater,
down
amountainside.
Avalanches
are1thebiggest
dangers
inthemountains
forboth
life
andproperty.
　　Allavalanches
arecaused
byanover-burden
ofmaterial,
typically
snowpack,
that
istoomassive
andunstable
fortheslope
2supports
it.Determining
thecritical
load,
theamount
ofover-burden
which
is3anavalanche,
4acomplex
task
involving
theevaluation
ofanumber
offactors.
　　Terrain
slopes
flatter
than
25degree ...