截止到4月7日,已经有24家上市公司预告一季度业绩将大幅增长,部分季报预增股如利润增长10倍的丹东化纤和四环生物等连续大幅上涨。从近期公布季报预增的情况以及预增股表现看,有以下几个特点:首先,医药、钢铁、石化、机械等行业中业绩预增的个股较多;其次,预增板块走势强劲,近? As of April 7, there are already 24 listed companies are expected to report a substantial increase in the first quarter results, some quarterly pre-shares such as Dandong Chemical Fiber and the ring of 10 times the profit growth continued to soar. From the recent announcement of the increase in quarterly earnings and the performance of pre-shares, there are several characteristics: First, there are more individual stocks that are pre-increased in performance in the pharmaceutical, steel, petrochemical and machinery industries; second, ?