如果病人大便潜血阳性，则病人最可能是
A．胰腺癌B．壶腹癌C．胆管下段癌D．胆管上段癌E．胆囊癌
参考答案：B
.
Britain, ______ many other industrialized countries, ______ major changes over the last 100 years.
A．together with; have experienced
B．as well as; have experienced
C．in common with; has experienced
D．instead of; has experienced
下列螺纹中，常用来联接的螺纹是（）
A.三角形螺纹
B.梯形螺纹
C.锯齿形螺纹
D.矩形螺纹
