题型:填空题 关于血栓闭塞性脉管炎坏疽期的叙述正确的是A.此期因神经坏死,疼痛突然消失B.静息痛C.先发生湿性坏疽,继而水分蒸发形成干性坏疽D.屈膝抱足为此期的典型体位E.常有肌肉抽搐,以晨起为重 查看答案
题型:填空题 A total of 548 students fell ill ______ consuming milk and biscuits in schools in Northwest China's Qinghai province on Wednesday, local authorities said.A.beforeB.whenC.afterD.while 查看答案