下列句子中没有通假字的一项是[ ]
A．士闻鼓音，破碎乱行
B．其不仁兹甚矣，罪益厚
C．拖其衣裘、取戈剑者
D．此固国家之珍而社稷之佐也
答案：D
He is a little bit mysterious these days. Nobody in our company knows exactly.
A．what he is working on
B．what is he working on
C．what did he work on
D．what was he working on
采用液力偶合器调速时有何优缺点？
