土石坝施工有哪些特点？
参考答案：
筑坝材料就地取材，工程量大，施工强度高，施工内运输量大，导游标准高，水文气象因素影响大，根据筑坝材料确定施工参数。
慢性活动型乙型肝炎的肝外表现如：关节炎、皮疹、肾病综合征是由于（）
A.Ⅰ型变态反应
B.Ⅱ型变态反应
C.Ⅲ型变态反应
D.Ⅳ型变态反应
E.Ⅴ型变态反应
It is said that his missing books were ______the possession of his former wife and they were valued____500,000$
A．in ; to
B．in; at
C．under; at
D．to; for
