When preparing a statement of cash flows under the indirect method, the adjustment to net income for an increase in wages payable (WP) and a decrease in the deferred tax liability (DTL) on the balance sheet compared to the prior reporting period is: Increase in WP Decrease in DTL（）①A. Negative No adjustment ②B. Positive Negative ③C. Positive No adjustment

A. ①

B. ②

C. ③

男性，78岁。左下颌后牙黏膜出现破溃疼痛1年。口腔检查残冠，颊侧黏膜上有一个直径1.5cm的深溃疡，周围硬，边缘不齐，底部呈菜花状，扪诊基底部有硬结。触诊下颌下淋巴结肿大。为明确诊断．最佳辅助诊断方法是（）

A．X线片检查

B．刮片检查

C．卡介苗试验

D．活体组织病理学检查

E．超声体层检查