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题库 / Prep2007E1-SC-34
Hundreds of species of fish generate and discharge electric currents, in bursts or as steady electric fields around their bodies, using their power either to find and attack prey, to defend themselves, or also for communicating and navigating.
either to find and attack prey, to defend themselves, or also for communicating and navigating
either for finding and attacking prey, defend themselves, or for communication and navigation
to find and attack prey, for defense, or communication and navigation
for finding and attacking prey, to defend themselves, or also for communication and navigation
to find and attack prey, to defend themselves, or to communicate and navigate
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either……or……之中的东西平行，杀AB
use……to do，杀BD
C、V.和n.连用，不平行，杀
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