【单选题】红细胞内游离原卟啉增加见于下列疾病,除外
【单选题】Which one of the following will increase the maximum internal rate of growth a corporation can achieve?
A.
increase in corporate tax rates
B.
reduction in the retention ratio
C.
decrease in the dividend payout ratio
D.
decrease in sales given a positive profit margin
【单选题】Economist Robert Barro attributes the increase in the duration of unemployment to ______, while economist Paul Krugman attributes the increased duration to _____.
A.
increased immigration of low-wage workers; tax cuts given to high-wage workers
B.
contractionary monetary policy; expansionary fiscal policy
C.
high marginal tax rates on the wealthy; high marginal tax rates on low-wage workers
D.
expanded unemployment-insurance coverage; insufficient consumer demand
【判断题】遇到瞎炮时,为保证安全,要先将导线剪断。( )