PLCC封装,外形呈正方形,()脚封装,四周都有管脚,与DIP封装相比,具有外形尺寸小、可靠性高的优点。
A、16
B、32
C、48
D、64
参考答案:B
_____ she was very tired, she went on working.
A.As
B.Although
C.Even
D.In spite of
统计分析方法包含在SPSS主菜单的( )的下拉菜单中
A.Analyze
B.Graphs
C.Date
D.Transform
E.Edit