问题如下：
If company has pretax income is $1,500,000，taxable income is $1,000,000 and tax rate is 35%, the company should report current tax expense is:
选项：
A. $350,000
B. $525,000
C. $175,000
解释：
Answer is A, current tax expense=taxable income * tax rate=1,000,000*35%=350,000
请问 pretax income和taxable income的区别是什么
