单项选择题
Recording estimated warranty expense in the year the related products are sold best follows expense recognition (matching) of accounting principle.（ ） A. 对 B. 错
单项选择题 In general, aggregate demand depends only on prices and total income and not on income distribution A. 对 B. 错
单项选择题 在闭式软齿⾯减速齿轮传动中，若⼩齿轮采⽤45钢调质处理，⼤齿轮采⽤45#钢正⽕处理，则它们的齿⾯接触应⼒( )。A.B.C.D.
