题目内容

下列各项中,不符合典型心绞痛疼痛特点的是()

A. 情绪激动时已发生
B. 疼痛位于胸骨后
C. 疼痛性质呈刀割样
D. 疼痛可放射至左肩
E. 疼痛常伴有窒息感

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腹痛多为活动后绞痛的是

A. 肠梗阻
B. 急性阑尾炎
C. 腹膜炎
D. 肾输尿管结石
E. 急性胃肠炎

In the function model of access network defined in ITU-T G.982, there are five successive building blocks in the user data plane, which are______________, ______________, ______________, ______________, ________________.

TreetopologyisusedinPONsystem,whichiscomprisedof______________,______________,______________.

In SDN, there are two planes: ______________plane is responsible for processing and delivery of packets with local forwarding state;______________plane is responsible for computing the state in routers (forwarding state).

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