presen
- n.普雷森
presen-
The usage of the Presen Pregressive Tense and the Present Participle .
写出下列动词的现在分词形式。
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Methods Sixty five patients with dilated cardiomyopathy were devided into two groups according to the left ventricular thrombus presen ( A group ) or not ( B group ), the echocardiography of each patient was evaluated and the role of clotting factors in left ventricular thrombus formation was assessed .
方法65例扩张型心肌病患者根据有无左室血栓分成A组（无左室血栓组）和B组（左室血栓组），对两组患者的临床资料及超声心动图进行比较分析。