患者男，65岁。腹胀，便秘，解脓血便2个月。查体：腹部平坦，无压痛、反跳痛和肌紧张，左侧中下腹部可扪及一约2cm×3cm大小肿块，较固定。

根据患者情况，首先要做的检查是

A．纤维结肠镜
B．腹部B超
C．直肠指诊
D．腹部X平片
E．血癌胚抗原测定

Johnson Corp. had the following financial results for the fiscal 2004 year:

A．Current ratio

B．2.00

C．Quick ratio

D．1.25

E．Current liabilities

F．$100000

F．Inventory turnover

F．12

F．Gross profit %

F．25