题型:选择题 _____the morning of September 10th, we are going to give our teacher some flowers.[ ]A. On B. In C. At D. / 查看答案
题型:单项选择题 遗传性血管性水肿病人可能与下列哪项有关()A.C3a和C5a合成过量B.C1抑制因子缺乏或功能缺陷C.病人IgE水平过高D.C2、C4水平常在正常范围内E.常因吸入过敏原导致症状突然发生 查看答案