By no means______(他把自己当成专家)although he knows a lot about the field.

A．It could lead to slower growth of the national economy.
B．It reflects Americans’ preference for imported goods.
C．It signifies a change in American economic structure.
D．It is the result of America’s growing focus on domestic market.

A．They have lost their leading position in many ways
B．They fail to convert knowledge into money.
C．They do not regard it as their responsibility.
D．They still have a place among the world leaders.