题目内容：
What does the author imply by saying “currencies don't turn on a dime” (Line 2,Para 7)?A．The dollar's value will not increase in the short term.
B．The value of a dollar will not be reduced to a dime
C．The dollar's value will drop, but within a small margin.
D．Few Americans will change dollars into other currencies.
参考答案：
答案解析：