A．Their different educational backgrounds.
B．Changing attitudes toward nature.
C．Chaos theory and its applications.
D．The current global economic crisis.Section B
A．They lay great emphasis on hard work.
B．They name 150 star engineers each year.
C．They require high academic degrees.
D．They have people with a very high IQ.
A．Long years of job training.
B．High emotional intelligence.
C．Distinctive academic qualifications.
D．Devotion to the advance of science.