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【单选题】
以下关于误码率的描述中,哪种说法是错误的( )A.
误码率是指二进制码元在数据传输系统中传错的概率
B.
数据传输系统的误码率必须为0
C.
在数据传输速率确定后，误码率越低，传输系统设备越复杂
D.
如果传输的不是二进制码元，要折合成二进制码元计算
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A.
is
B.
are
C.
was
D.
were
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A.
meaningful
B.
meanwhile
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during
D.
when
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A.
教育必须为社会主义现代化建设服务;
B.
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C.
必须与生产劳动相结合;
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培养德、智、体等方面全面发展的社会主义事业的建设者和接班人
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【单选题】—What’s on the plate? some eggs and cakes on it? —There _____some eggs and cakes on it.
A.
is
B.
are
C.
was
D.
were
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