sheddemonstrateexposearrangevulnerable entitledinsulted cautionedYoung birds are very ___________ to predators.
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sheddemonstrateexposearrangevulnerable entitledinsulted cautionedShe felt ____________ by the low pay for her painting.
sheddemonstrateexposearrangevulnerable entitledinsulted cautionedShe __________ no tears when she heard this bad news.
sheddemonstrateexposearrangevulnerable entitledinsulted cautionedYou should ____________________ more skills to the public.
光的偏振现象说明了光是一种____波(填“横”或“纵”)。