(118～120题共用题干)男性，40岁，劳累后突然呕大量咖啡色胃内容

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问题单项选择题

(118～120题共用题干)男性，40岁，劳累后突然呕大量咖啡色胃内容物，查体：面色苍白，巩膜轻度黄染，四肢湿冷，脉细数，血压正常。

其出血原因最可能是

A．出血性胃炎

B．门静脉高压症

C．胃十二指肠溃疡病

D．胆道出血

答案

参考答案：B

选择题

So lost in their computers____that leaders at summer computer camps often have to force them to break for sports and games.

A．became the children

B．become the children

C．had the children become

D．do the children become

问答题简答题

列举理解导致LAN拥塞的可能原因？