将模拟信号转换成数字信号用（）转换器，将数字信号转换成模拟信号用（）转换器。
参考答案：A/D；D/A
完成句子（每空1分，共8分）
根据所给提示，完成句子，每空一词，含缩略词。
小题1:Tony did his homework just now. (改为否定句)
Tony ___________ _____________ his homework just now.
小题2:The workers grew many flowers in Chongqing Expo Garden. (改为被动句)
Many flowers _________ ____________ in Chongqing Expo Garden.
小题3:The exchange student often teaches himself Chinese. (改为同义句)
The exchange student often __________ Chinese _________ himself.
小题4:我已经有一个月没有收到她的来信了。(完成译句)
I haven’t _________ ___________ her for one month.
在Word的编辑状态下对当前插入点所在段落设置悬挂缩进，则 (45) 。
A．该段的所有行起始位置都重新确定
B．插入点所在行的起始位置被重新确定
C．除首行外，该段各行的起始位置都重新确定
D．该段首行的起始位置重新确定
