There _____________ a pen and two pencils in the box. [ ]
A. are
B. is
C. has
D. have
答案:B
下列选项中不属于公文办理程序的是( )。
A.签收和启封 B.登记和审核C.分发和传阅 D.检查和上交
实现比较两个字符串大小的函数是_____。