word study1
（一）destruct , destructive(ness), destruction; destructible(ness)/destructibilityConstructive, instructive
(1) a destructive storm
(2) Those anticancer drugs are effective, but also destructive to white blood cells.
(3) Corruption will finally be destruction of our whole society.
(4) destructive/constructive criticism
(5) Drug taking was his destruction.
a destruct ional plain 侵蚀平原
（二）Affection, affectionate(ly), affective, affectation, affect
Affect illness/indifference/an American accent
Without affectation, make an affectation of interest
An affected smile,
（三）perceive, perceptive, perception; perceptible/perceivable, perceptibility; perceptual
Perceive, perceptive(ness); perceptivity
perceptual knowledge/response to
(1)He is a man of great perception/perceptiveness./He is a perceptive man.
a perceptive eye/ perceptive comments
(2) a perceptive audience
To devote a perceptive chapter to corruption
He is kind and _________ about others.
(3) There was a _________ smell of coffee coming out of the kitchen.
(4) There are barely ___________ differences between the twin sisters.
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