地面呼叫喇叭响有可能是（）.A.设备冷却低流量传感器警告信号 B.机组呼叫 C.惯导

可引起角膜穿孔的角膜病变是（）

A.角膜老年环

B.蚕蚀性角膜溃疡

C.边缘性角膜变性

D.带状角膜病变

E.细菌性角膜炎

子宫内膜癌转移途径主要为______________、___________，晚期有____________。

中毒导致休克的原因有哪些？

模拟信号与数字信号的划分是依据（）。

A、幅度上是否离散

B、时间上是否离散

C、幅度和时间上是否都离散

D、幅度或时间上是否离散

Which of the following actions was least likely a warning sign of potential earnings manipulation disclosed in Sunbeam’ s financial statement footnotes（）

A. A record level of earnings, yet operating cash flow was negative.

B. Significant use of barter transactions.

C. Receivables were increasing, but bad debt expense was decreasing.