“潜在的并发症：出血性休克，与应激性溃疡有关”是( )A．现存的护理诊断 B．高危的

该患者的诊断应首先考虑

A．溃疡性结肠炎

B．结肠癌

C．克罗恩病

D．肠梗阻

E．肠穿孔

（1）在图1中做出人看到球的光路图．

（2）如图2所示，一束光AO从空气斜射入水中，请在图2中画出：①过O点的法线； ②折射光线的大致方向．

An analyst does research about shareholders voting. With respect to shareholders voting for a candidate for the board of directors, which of the following is most likely to allow shareholders to direct their total voting rights to specific candidates（）

A. Statutory voting.

B. Cumulative voting.

C. Proxy voting.

高炉煤气管道一旦发生泄漏煤气，它向下沉、向下扩散。（）

电焊机的一次电源线的长度，一般不超过（）m。

A.2~3

B.5～6

C.10