题目内容

BPRS为一中等长度的量表，关于此量表优点的描述，不正确的是（）

A. 项目简明而且比较全面
B. 信度和效度均比较满意
C. 对兴奋状态的评分准确
D. 可用于合作的重性精神患者且对症状变化敏感
E. 可用于不合作的重性精神患者且对症状变化敏感

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Which three statements are true about Source Specific Multicast？（）

A. Is best suited for applications that are in the one-to-many category.
B. SSM uses shortest path trees only.
C. The use of SSM is recommended when there are many sources and it is desirable to keep the amount of mroute state in the routers in the network to a.
D. There are no RPs to worry about.

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