下列各项中不属消化性溃疡治疗目的的是（）。
A.消除症状
B.防治并发症
C.促进溃疡愈合
D.尽早手术根治
E.预防复发
参考答案：D
Some animals, in order to keep themselves________by the enemies, go out for food at night. [ ]
A. not to be attacked
B. against being attacked
C. from being attacked
D. not being attacked
理想气体过程方程为pVn=常数，当n＝±∞时，其热力过程是（）。
A.等容过程
B.等压过程
C.等温过程
D.绝热过程
