截止2008年底，我国港口共拥有生产性泊位31050个，是1978年的多少倍？（）
A.40
B.41
C.42
D.43
参考答案：C
An analyst does research about interest rate policy tools. In implementing monetary policy, which of the statements is NOT used as an interest rate policy by the U. S. Federal Reserve（）
A. Bank reserve requirements.
B. The prime rate.
C. Verbal persuasion to influence how banks supply credit to businesses and consumers.
柜员卡密码，应定期更换个人密码，最长不超过（）天，避免失密。
A.10天
B.15天
C.20天
D.30天
