While ______ the museum, I encountered an old classmate.
A. visit
B. visited
C. be visiting
D. visiting
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_______
A. 工作表
B. 行
C. 列
D. 单元格
_______
A. Dept=DS
B. Dept=DS WITH CHECK OPTl0N
C. Dept='DS'
Dept='DS' WITH CHECK OPTIoN
_____
A. 基类
B. 派生类
C. 基本类型
D. 用户定义类型
____
A. +1
B. -215
C. -1
D. -216