A.heavy
B.easily damaged
C.affected by temperature
D.costly relative to the strength ratio
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A.stopper
B.screen
C.filter
D.restrictor
A.rising warm air
B.proximity to a low pressure area
C.inward spiraling circulation
D.clear dry weather
A.Has there been
B.Have there been
C.Has there
D.Have there
A.From
B.By
C.on
D.With
A.Have
B.Has
C.Is there
D.Are there
最新試題
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