当计算机系统执行通道程序完成输入输出工作时，执行通道程序的是( )
A．CPU
B．通道
C．CPU和通道
D．指定的外设
参考答案：B
Have you heard Mary was robbed during her trip to Egypt? Not only _________ her money, but she was nearly killed.
A．she lost
B．had she lost
C．she had lost
D．did she lose
下列现象中属于热传递改变物体内能的是（ ）
A．冬天在户外时两手相搓一会儿就暖和
B．反复弯折后的铁丝弯折处会发热
C．晴天时棉被晒得暖乎乎的
D．汽油在气缸内经压缩冲程后温度升高
