56 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.
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某县医院欲开展结扎手术和终止妊娠手术，须经哪一级部门批准（）
When he first started in university, he really felt at _____ with his major --- economics.
A. shore B. bank C. ocean D. sea
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