上级国库下发的应用系统，下级国库不得擅自修改，不得随意打开（）。
A、应用系统
B、数据库
C、业务用机
参考答案：B
Mr. Smith was quite satisfied with his new flat ______ beside the West Lake Park and decided to settle down
there. [ ]
A. located
B. locating
C. to locate
D. locate
下述哪项支持胃的恶性溃疡（）。
A.溃疡呈圆形、椭圆形
B.边缘整齐，不隆起
C.底部平坦
D.火山口状，底部凸凹不平
E.皱襞向溃疡集中
