犬发生急性肾小球肾炎的时候,尿管型多为______。
A.细胞管型 B.透明管型 C.颗粒管型D.脂肪管型 E.蜡样管型
参考答案:A
除硫操作只能在装置停工时进行。
The ______ contract is a contract between a party who agrees to accept the risk and a party seeking protection from the risk.A. payment B. productionC. shipmentD. insurance