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AYUDA URGENTE!!! NECESITO IDENTIFICAR EN ESTE TEXTO 10 *FRASES SUSTANTIVAS* EN INGLÉS, REGALO PUNTOS​, ES PARA MAÑANA

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What Does NASA Do With Helicopters?

NASA conducts research on ways to make helicopters better. Crash tests help make helicopters safer. NASA studies how new materials can keep passengers safe if a helicopter crashes. Wind tunnel tests determine how to make helicopters quieter and more fuel-efficient. New ideas could help engineers create bigger, better and faster helicopters. Someday helicopters could carry 100 people on trips of 300 miles or more. NASA has even studied how helicopters could be flown on Mars!