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(x)(ji)ԣҪҴ~RҪôȫּ~RλQԒfҪЩԭһѵ~Roλ
95ӢίTBritish CounciloΨһ}µ}Ŀ:The Spectacular Eruption of Mount St.Helens
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sodium W(xu)c---yֻҪ֪һNW(xu)Ԫ
Simultaneous ͬr---L@N~c(din)Q(yng)鶨λ~
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“What are the dates of the TWO major eruptions before 1980?”
ô1980 3185$ 69%@Щ~?yn)LԭȫӢͻȻׂܳ(sh)ʮ@Ҳͺܺûԭҵ
3.~бw,Č~@һc(din)ҶϤöf
4.̖
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