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问题 多项选择题 案例分析题

男性，50岁，因"突发中上腹疼痛3小时"入院。查体：全腹胀，全腹有压痛，反跳痛，以剑突下偏右以及右下腹最明显，全腹肌紧张，移动性浊音（±）。

如选择手术，可选择（）

A.胆囊切除术

B.胃、十二指肠溃疡穿孔修补术+腹腔引流术

C.阑尾切除术+腹腔引流术

D.胃大部切除+胃肠吻合术

E.单纯腹腔引流术

答案

参考答案：B

单项选择题

Flow control is a function that prevents network congestion by ensuring that (66) do not over-whelm (67) with data. There are three commonly used methods for handling network congestion. (68) is used by network devices to temporarily store bursts of excess data in memory until they can be processed. (69) are used by receiving devices to help prevent their buffers from overflowing. (70) is a flow-control scheme in which the source device requires an acknowledgment from the destination after a certain number of packets have been transmitted.

A．Buffer

B．Source-quench messages

C．window

D．Windowing

E．Buffering
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单项选择题

水样中加入硫酸锰和（）生成氢氧化锰沉淀，氢氧化锰极不稳定，迅速与水中溶解氧化合，生成棕色的沉淀，用以测定水中溶解氧的含量。

A、碱性氯化钠

B、碱性氯化钾

C、碱性碘化钾

D、碱性磷酸钾
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