胃十二指肠溃疡手术的绝对适应证是
A．瘢痕性幽门梗阻B．胃十二指肠溃疡大出血C．胃十二指肠溃疡急性穿孔D．十二指肠溃疡并球部变形
参考答案：A
因式分解
（1）mx（a-b）-mx（b-a）
（2）ax3-6a2x2+9a3x．
—Would you like coffee or tea?
—Coffee, please.By the way, do you have milk? I like coffee ______ milk.[ ]
A. for
B. or
C. with
D. without
