迷走神经切断术治疗十二指肠溃疡时,附加幽门成形术的目的是()
A.降低溃疡复发率
B.防止手术后腹泻
C.有利于消化吸收
D.进一步降低胃酸
E.解除胃滞留
参考答案:A
—Americans hate being asked about their ________ lives.
—Yes. They think their ________ is important.
A. privacy, private
B. private, private
C. private, privacy
D private, private
下列在一定条件下能发生水解的高分子化合物是 [ ]
A.肥皂
B.油脂
C.蛋白质
D.乙酸乙酯