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【多选题】
下列计算机术语中,显示系统的主要性能指标有( )。A.
刷新速度
B.
内存容量
C.
颜色质量
D.
显示分辨率
E.
打印效果
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反馈参考答案：
举一反三
【单选题】I letters since then, but I haven't finished them yet. [ ]
A.
have written
B.
have been writing
C.
wrote
D.
has been writing
【单选题】I haven't finished my composition. I _____ for two hours and a half. [ ]
A.
have written it
B.
have been writing it
C.
wrote it
D.
am writing it
【单选题】听力原文：W: I haven't written to my parents for almost three months. They must be very angry with me. M: I don't think it is that serious. What will the woman probably do?
A.
She will go home.
B.
She will telephone home.
C.
She will write home.
D.
She won't do anything.
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