It's time _____ lunch. [ ]
A. to
B. for have
C. for the
D. to have
答案：D
如果在程序中要将c定义为静态变量，且为整型数，则应使用的语句是
A．Redim a As Integer
B．Static a As Integer
C．Public a As Integer
D．Dim a As Integer
口腔黏膜疱性损害时疱壁的厚薄取决于( )
A．疱内分泌物性质B．疱的部位是在皮下还是在皮内C．疱的数量多少D．疱的大小与数量E．以上均不正确
