Use of English · Parte 3
After decades of relative stagnation, human (0) EXPLORATION (EXPLORE) of space is entering what many engineers consider its most consequential phase yet. Advances in reusable rocket (1) .......... (PROPEL) have dramatically reduced the cost per kilogram of payload delivered to orbit, and scientists are now seriously…
Desbloquea todos los exámenes, simulaciones ilimitadas, las 80 fases del juego y mucho más.