资讯

(CNN) — Astronomers have spotted the brightest fast radio burst yet coming from a nearby galaxy. Observations of this phenomenon, a powerful flash of radio waves that lasts only about a millisecond, ...
Write a function that takes in a string and returns the first non-repeated character in it. Example: for input string as aabbcdd the output should be c.
An international team of scientists, including Northwestern University astrophysicists, has spotted one of the brightest fast radio bursts (FRBs) ever recorded—and pinpointed its location with ...