严重的骨盆骨折失血量最多可达1500ml。()
参考答案：错
They know a lot about animals, but they want to know _ about them. [ ]
A. many
B. much
C. more
D. some
泌尿系感染最常见的病原菌是
A．革兰阳性杆菌B．革兰阴性球菌C．革兰阳性球菌D．革兰阴性杆菌E．真菌
