NO.PZ2018062016000044
问题如下:
Return is positive refers to yen appreciation and negative refers to yen depreciation. Compared to yen depreciation, yen appreciation is:
选项:
A.more frequent
B.less frequent.
C.the same frequent.
解释:
A is correct. .From the picture ,we can clearly know that positive return is more frequent.
怎么算的正数、负数,上升下降、频率?