AB
B、字处理软件
A`B`
应是B,某网[http://cache.baidu.com/c?word=word%3B%CA%C7%3B%D2%BB%3B%D6%D6%3B%BC%AF%3B%B1%E0%BC%AD%3B%D3%EB%3B%B4%F2%D3%A1%3B%CE%AA%3B%D2%BB%CC%E5%3B%B5%C4%2C%B4%F0%B0%B8&url=http%3A//zjl%2Eccjy%2Ecn/ds%5F4%5F1%2Ehtm&b=0&a=30&user=baidu#0]上有答案.