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问题 单项选择题

如果某机件寿命的标刻标的是“2”时，该机件可能的寿命是多少？试从下列选项中选出不正确的选项。（）

A、70小时

B、80小时

C、90小时

D、100小时

答案

参考答案：A

单项选择题

A management domain typically contains a large amount of management information. Each individual item of()information is an instance of a managed object type. The definition of a related set of managed()types is contained in a Management Information Base (MIB) module. Many such MIB modules are defineD. For each managed object type it describes, a MIB()defines not only the semantics and syntax of that managed object type, but also the method of identifying an individual instance so that multiple()of the same managed object type can be distinguisheD. Typically, there are many instances of each managed object()within a management domain.

Each individual item of（）information is an instance of a managed object type.

A．rotation

B．switch

C．management

D．transmission
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单项选择题

男性，38岁。反复咳嗽、咳黄脓痰，间断小口咯血8年，痰量多，常大约100ml/d伴有鼻塞、黄涕、头晕。近3d咳嗽，咯黄脓痰和血痰，痰量大增，伴发热，体温39.5℃，气促明显。1h前突然大咯血，鲜血从口鼻涌出。该患者引起大咯血的原因最可能为

A．支气管黏膜深层溃疡
B．并发慢性支气管炎，并急性加重
C．支气管动脉与肺动脉终末支气管扩张，血管瘤破裂
D．支气管发生囊性扩张
E．支气管动脉先天性解剖畸形
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