befre.While they clygetn well with each other,the pair's significant age gap has unavoidably
led oetsespecally when it comes to their different tastes in music.
Life is very short.As for Grandma Joy,she's enjoying making up for lost time,and now
has several stamps in her first passpor."s for me.the glass is half full,not half empty.
And the people that I meet along the way lift my spirits.Besides,not everybody is lucky
enough to have a grandson that's willing to drag them around,"she says.
24.What is the new ambition of Grandma Joy and Brad
A.To get passports.
B.To tour the world.
C.To become famous musicians.
D.To visit all national parks in the US.
25.What does the underlined word "spoil"in paragraph 3 mean
A.Bring.
B.Record.
C.Ruin.
D.Spread.
26.How has traveling together affected Grandma Joy and Brad
A.They have built a closer relationship.
B.They have collected several glasses.
C.They have learned to avoid all conflicts.
D.They have developed the same taste for music.
27.Which word can best describe Grandma Joy
A.Humorous.
B.Generous.
C.Honest.
D.Optimistic.
C
Sperm whales (have the biggest brains of any animal on the planet at up to
twenty pounds,as much as six times the size of an average human brain.They live in groups
of about ten and sometimes meet up with hundreds or thousands of other whales.Sperm
whales can grow up to eighteen meters long and dive to nearly 1,000 meters to hunt for food.
They sleep upright and in groups.
Like many whales and dolphins,sperm whales are highly social animals and communicate
underwater by strings of rapid clicks,which are also used to help them locate and track their
food.
In a study published in the journal Nature Communications,researchers analyzed more
than8,7o0 pieces of sperm whale clicks that they believe make up a“phonetic alphabet(音标)”,
which the whales can use to build the very rough equivalent(对应的事物)of what people think
of as words and phrases.They say they have found four basic components that they think
make up this phonetic alphabet.Pratyusha Sharma,the paper's lead researcher,says this
alphabet could then be used by the whales in an unlimited number of combinations.
To get enough records of the sperm whale clicks in Dominica,where there is a residential
population of about 200 sperm whales,scientists created a huge underwater recording studio
with microphones at different depths.Devices on the whales recorded what position they were
in when clicking-for example,diving,sleeping,breathing at the surface-and if there were
any other whales nearby they might be communicating with.
Jeremy Goldbogen,an associate professor of oceans at Stanford University,who was not
involved in the study,said that if we were one day able to understand what sperm whales were
saying,that knowledge should be used for conservation purposes,like minimizing their risk of
being hit by ships or reducing ocean noise levels.
David Gruber,founder and president of the Cetacean Translation Initiative,says millions
and possibly billions of whale clicks would be needed to collect enough data to try to work out
what the whales are saying,but he expects AI to help speed the analysis.
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