【单选题】A proposed regulation to require infants traveling in airplanes to sit in approved safety seats was never adopted. If we think about how people respond to incentives, the most likely reason is that
A.
people would switch from flying to driving, so the death rate would rise.
B.
the airline industry is a powerful lobby in Washington.
C.
it would require every seat in airplanes to be made wider so the infant seats would fit.
D.
the airlines threatened to bring a lawsuit against the government.
【简答题】It’s impossible to determine how many people would have lost their lives without the contribution of African-American inventor Dr Charles Drew. Charles Drew was born on June 3, 1904, in Washington, DC...