試題詳解

47 According to the passage, which of the following hypotheses is made by scientists from Cornell University?
(A) The mediocrity principle rules out the possibility of life forms on other planets.
(B) Aliens from Earth-like planets might use light waves to communicate.
(C) Extraterrestrials from 8,500 planets might have translated signals from Earth.
(D) Aliens might need to interpret about 3,000 languages to understand Earth.