东北最古老的城市是哪里（）
A、沈阳
B、辽阳
C、开原
D、抚顺
参考答案：B
语音识别引擎目前指定的语言包括______。
A．简体中文
B．美国英语
C．日语
D．德语
There isn't any difference between the two. I really don't know _________. [ ]
A. where to choose
B. which to choose
C. to choose what
D. to choose which
