抗人血红蛋白血清，不仅具有种属特异性，而且还具有脏器特异性，故既可用于血痕的种属检验，也可用于血痕的确证检验，从而可省略确证试验。
参考答案：对
So desperate ________ that no one could help another, each ________ to save himself and his animals.[ ]
A．was the situation; was trying
B．the situation was; trying
C．the situation was; was trying
D．was the situation; trying
快速进行性肾小球肾炎的主要病理变化是
A．内皮细胞增生B．脏层上皮细胞增生C．壁层上皮细胞增生D．成纤维细胞增生
