Echolocation in the sea and in people: dolphins, whales, swiftlets and clicking humans

The 15 questions of lesson 230 «Echolocation in the sea and in people: dolphins, whales, swiftlets and clicking humans» of the biology course of Mova's primary school with their options, 82 sentences, every one parsed by Mova with its syntax tree and pragmatics. How the student did on them: the lesson at school.

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