硫酸储罐的材质为（）。
A.碳钢
B.哈氏合金
C.不锈钢
D.低碳钢
参考答案：A
It is reported that amounts of investment in the area_____________2 percent annually during he past two years.
A．have been risen
B．have been rising
C．are rising
D．are risen
膜性肾病早期表现肾病综合征时，治疗可选用（）
A.消炎痛
B.潘生丁
C.肝素
D.血液透析
E.糖皮质激素
