By measuring the different intensity of courtship, the team aims to______.
A. find out which male birds are more attracted
B. get information to build a standard to compare
C. do the research in a novel way
D. figure out how male birds respond to females
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互联网三级分层模型中的核心层的实现通常是高速wan、atm、t1/e1或帧中继。()
The neuroimaging studies show that shyness is______.
A. a kind of disability due to differences on the brain
B. something that only emerges in a child in infancy
C. something that stays with the person for all his or her life
D. not a learned behaviour—it is innate