市场法评估房地产价格时的三个难题，即，交易实例的搜集、指标因素的修正以及估价结果的确定。
There are three problems when real estate price is appraised by means of market comparison approach, namely, collection of cases, revision of index factors and determination of appraisal results.
探讨单纯性多发性肌炎（PM）活动期的临床表现及实验室指标变化，并综合分析两者对活动性的评估价值，从而正确、客观地判断疾病活动性，进一步指导治疗。
To investigate clinical manifestation and laboratory indexes of polymyositis(PM) in active stage and their assessment value, and then judge the disease activity correctly.
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