单侧眼球下陷见于（）
A.Horner综合征
B.脑血管疾病
C.严重脱水
D.甲状腺功能亢进症
E.颅内病变
参考答案：A
—Have you worked here since you graduated?
—No, I ____________at a factory in Beijing for six years.
A．would work
B．have worked
C．had worked
D．worked
槽孔固壁土料质量要求，槽孔固壁土料pH值应大于（）。
A.7
B.8
C.9
D.10
