A.learn how to be a professional actor in school
B.consider acting to be their regular jobs
C.often participate in performance when in school
D.watch plays in the West End theatre district in London
27.What is the article mainly about?
A.Reasons why British people love plays.
B.The origin of theatre traditions in the UK.
C.Rules for theatregoers to follow in the UK.
D.The popularity of non-professional plays in the UK.
C
Dogs and other hairy mammals（哺乳动物）shake at just the right frequencies to get rid of water most quickly from their bodies. Mice do it. So do tigers and pandas. These animals really know how to shake. Frequency is the number of cycles—movements back and forth—per second.
Researchers at the Georgia Institute of Technology in Atlanta recently recorded videos of 40 different animals, standing for 15 different species （物种）. The scientists wanted to see how wet, hairy mammals shake off water after they get wet. The scientists said the animals shake at just the right frequencies to lose water drops as quickly as possible. “I think it’s pretty extraordinary that they can do that,” David Hu, one of the scientists, said.
This study was led by Andrew Dickerson, a graduate student in Hu’s lab. His team calls this get-dry shake “natural washing machine”. Both the washing machine and shaking animals can get rid of water quickly—but animals are much faster than washing machines. For animals, this process helps them control heat in their bodies.
“If a dog couldn’t dry itself, it would have to use 25 percent of its - 7 -