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【单选题】
双绞线由两根相互绝缘的、绞合成均匀的螺纹状的导线组成，下列关于双绞线的叙述，不正确的是()。A.
它既可以传输模拟信号，也可以传输数字信号
B.
它的传输速率达10Mbit/s~100Mbit/s，甚至更高，传输距离可达几十公里甚至更远
C.
与同轴电缆相比，双绞线易受外部电磁波的干扰，线路本身也产生噪声，误码率较高
D.
通常只用作局域网通信介质
拍照语音搜题，微信中搜索"皮皮学"使用
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皮皮学刷刷变学霸
举一反三
【单选题】-Dad, could I watch TV now? -Yes, _____. But you have to finish your homework first. [ ]
A.
you can
B.
you could
C.
you watch
D.
you do
【单选题】听力原文：W: This food is terrible. I can't even finish my dinner. M: I know. You think with all the money we pay for room and board, the university could hire a better food service. Where are you headed n...
A.
In the student recreation center.
B.
In the campus dining hall.
C.
In the university bookstore.
D.
In a classroom.
【单选题】What I require of you is_____. Y ou should finish the task in 2 hours.
A.
that
B.
it
C.
this
D.
those
【简答题】( )年底, 社会主义基本制度在我国初步确立, 标志着中国历史上长达数千年的阶级剥削制度的结束。
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