【单选题】Which group of people are not mentioned about falling suicide rates?
A.
middle-aged men in the US
C.
old people in the world
【单选题】肝 肝脏主要是用来帮助( )消化与吸收。 脏 肝脏主要是用来帮助( )消化与吸收。 主要是用来帮助( )消化与吸收。
【单选题】In developing countries, exchange rates tend to be
A.
floating with some government intervention.
C.
hard to tell from the data.
D.
run by currency boards.