必须行手术治疗的幽门梗阻是
A.先天性幽门梗阻
B.瘢痕性幽门梗阻
C.肿瘤性梗阻
D.水肿性幽门梗阻
E.痉挛性幽门梗阻
答案:ABC
参考答案:A, B, C
She bought the painting at a much higher______ than its real_______.
A.value, price
B.price, value
C.value, value
D.price, price
冲击成孔灌注桩施工时,当钻入桩端持力层的基岩后,应每钻进( )清孔取样一次。
A.100~500mm
B.200~500mm
C.300~500mm
D.100—300mm