问题
单项选择题
（）to the papers is restricted to Defense Department personnel only.
A.Application
B.Exception
C.Access
D.Glance
答案
参考答案：C
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（）to the papers is restricted to Defense Department personnel only.
A.Application
B.Exception
C.Access
D.Glance
参考答案：C
，讨论a的取值，确定f(x)的间断点及其类型．