计算机网络是地理上分散的多台 按照相同的通信协议,通过软硬件互联的系统。
A. 计算机
B. 主从计算机
C. 自治计算机
D. 数字设备
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What’s the boy’s name?________ name is Jim.
A. My
B. His
C. Her
D. Your
Is this your pen?
A. Yes, it is.
B. Yes, they are
C. No, you aren’t.
Mike and Liu Tao______ at school
A. are
B. is
C. am
D. be