( )是指利用计算机来帮助人类完成相关的工作。
A．信息处理
B．人工智能
C．计算机辅助系统
D．过程控制
参考答案：C
看到交通警察这种姿势时可以直行通过。
The top student failed again in the examination and only then ______ the importance of reading and memorizing the English texts.
A．he realized
B．he had realized
C．had he realized
D．did he realize
