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注：在大纲新增词部分，有一些单词属于带星号(*)的积极词汇(即核心词汇)，这部分词汇在此列出，后面标注“积极词”。
I iceberg
ideological
ignorance *
illegal
immediately *
immunize
impair *
impart *
impede *
imperialism
imperialist
impetus *
implicit *
impractical
imprison
impromptu
inadequate
inborn
incompatible
incompetence
incomplete
incomprehensive
inconsistency
incur
indefinite
indicative
indignation
indoor *
inductive
industrialize/-ise
infectious *
inference
infinity
inflict
infringe
ingenious
inlet
innumerable
inquiry/enquiry *
insider
instantaneous
institutional
instrumental
insurgency
insurgent
intact
integral *
integrity *
intelligible
intent
interactive
intercourse
interference
interim
intermediary
intermittent
interrogation
intersection
intimidate
into *
intolerance
intolerant
intricate
intrinsic *
invaluable
investigator
invisible
irrational
irrespective *
irrigation
isolation
italic
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