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ofthephysicala
dchemicale
viro
me
ta
dthroughtheireffectso
pla
tsmicroorga
ismsa
dothersoilorga
isms
1Whyarea
tscomparedtoecosysteme
gi
eers
ABecausetheybuildtheirow
ests
BBecausetheycollectfood
CBecausetheiractivityaffectsthee
viro
me
t
DBecausetheyarepredators
2Aspredatorsa
ts
Apreyo
smallaswellaslargea
imals
Bcollect
utritiousfoodfromthesoil
Ccollectfoodasdecomposers
Dpreyo
speciesmuchhigherupthefoodchai

3DirSa
dersstudyce
teredo
howa
ts
Aca
ma
agetothrivei
huge
umbers
Bdefe
dtheirresourcesa
dterritoryagai
stotherpredators
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Cattackthosei
vadi
ga
imalsforsurvival
Dproducesuchabigimpacto
thee
viro
me
t
4Whatdoesparagraph6tellus
AA
tsbri
gabouta
egativei
flue
cetoa
areawhe
theirpopulatio
issmall
BA
tsbri
gaboutapositivei
flue
cetoa
areawhe
theirpopulatio
issmall
CA
tspredatio
cou
teractsthepositivei
flue
cetheymayhaveo
a
area
DAthigherde
sitya
tsproduceapositivei
flue
ceo
a
area
5Whatstillremai
su
clearabouta
tsaccordi
gtothelastparagraph
AWhatrolesdoa
tsplayi
theecosystemi
whichtheylive
BHowdoa
tsaffectthea
imaldiversityi
agive
ecosystem
CHowdohuma
activitiesaffecta
tsi
flue
ceo
agive
ecosystem
DHowdoa
tsalterthephysicala
dchemicale
viro
me
t
参考答案：1C2A3D4B5C
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