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λ~ʲôӵ?
λ~w׃Ժͼ(x)(ji)
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95Ӣ(gu)ίT(hu)British CounciloΨһ}µ}Ŀ:The Spectacular Eruption of Mount St.Helens
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@}ҰMount St.Helens P(gun)I~ԭM(jn)жλ(hu)ȫҪvľʥ˹ɽćl(f)ԭN(g)Mount St.HelensԼʹ@(g)~ڴČ~`˼(x)(ji)ǸԵ~RҲ鶨λ~팤Ҵ
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Ƕλ~ķ
1.~R
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L(zhng)y
@N~~п@ӵ~һҪ磬
Sequoia ɼ ---ܺöλҲ(jng)鿼c(din)
sodium W(xu)c---yֻҪ֪һNW(xu)Ԫ
Simultaneous ͬr(sh)---L(zhng)@N~c(din)Q(yng)鶨λ~
2.(sh)ָ֣ͨr(sh)gXͰٷֱ
һ(g)}Ŀ@ӆģ
“What are the dates of the TWO major eruptions before 1980?”
ô1980 3185$ 69%@Щ~?yn)L(zhng)ԭȫӢͻȻׂܳ(g)(sh)ʮ@ۣҲͺܺûԭҵ
3.~бw,Č~@һc(din)ҶϤöf
4.̖(ho)
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