硬质面包烘烤时，一般对湿度的要求较简单，正常烤箱内的湿度已能满足硬质面包的需要。
参考答案：对
A company reports sales of $50000000 for the year ended 31 December 2009. Accounts receivable balances were $6000000 at 1 January 2009 and $7500000 at 31 December 2009. The company's cash collections from sales for 2009 are closest to.()
A. $42500000.
B. $48500000.
C. $51500000.
简述目视检查的特点。
