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【单选题】
计算机系统包括( )。A.
系统硬件和系统软件
B.
硬件系统和软件系统
C.
主机和外部设备
D.
主机、键盘、显示器和辅助存储器
手机使用
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反馈参考答案：
举一反三
【简答题】You are a German living in Berlin. One day you’ re walking down the street, minding your own business, when suddenly a stranger comes up with a smile on his face. After stopping you, he holds a smal...
【单选题】In some cases, the thesis and plan of development appear in the same sentence in a well-written introductory paragraph. However, writers sometimes choose not to describe _________.
A.
the thesis or the plan of development
B.
the thesis
C.
the plan of development
D.
the thesis and the plan of development
【单选题】—Better get down to your work, Tom. —_________.
A.
It’s my pleasure
B.
Don’t mention it
C.
Mind your own business
D.
You’re welcome
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