网形网网路结构的冗余度较大，稳定性较好，但线路利用率不高，经济性较差。
参考答案：对
什么是法律？它与道德、纪律等规则相比较有哪些主要特征？
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Drug abusing may have some side effects on one's health; however, it is not always ________ if he stops
it timely. [ ]
A. permanent
B. temporary
C. avoidable
D. beneficial
