坐位时胸段脊柱呈均匀性向后弯曲，仰卧位时弯曲消失的疾病是（）
A.佝偻病
B.强直性脊柱炎
C.胸椎结核
D.脊柱退行性变
E.脊柱外伤
参考答案：A
Nowadays workers are earning per month as they did in the 1990s.
A．twice as much as
B．as twice as much
C．as much twice as
D．twice as much
血清淀粉酶升高最常见于（）
A.十二指肠溃疡穿孔
B.胆囊炎
C.胰腺癌
D.急性胰腺炎
E.胆管梗阻
