During the 1920s in Germany and during the 1980s in Brazil and Israel, inflation reached hyperinflationary levels. People received their wages and spent them immediately. Companies received revenues from their sales and immediately paid them out as wages and dividends. This behavior best reflects which one of the following adverse effects of inflation for an economy（）

A. Tax distortion.

B. Gains by employers at the expense of employees.

C. Increased transactions costs.

2003年10月“神州五号”成功地进行了中国首次载人航天飞行，圆了中国人的飞天梦。宇航员携带的太空食品的营养成分主要包括水、无机盐、            、             、               和              等。