儿童生长发育迟缓食欲减退或异食癖，可能缺哪种物质（）。
A.钙
B.硒
C.镁
D.锌
E.钠
参考答案：D
An analyst does research about cash flow statement. When a company finances accounts payable, an immediate effect on its cash flow statement is most likely to:（）
A. decrease operating cash flow.
B. increase operating cash flow.
C. shift cash outflow from operation to a later time period.
实现目标利润的措施有（）。
A、销售数量提高
B、销售价格下降
C、单位变动成本提高
D、固定成本提高
