单项选择题
匀速进展横道图中,对于表述进度状态判别方法不正确的是( )。
- A.粗黑线右端与检查日期线重合,表示实际进度与计划进度一致
B．粗黑线右端位于检查日期线右侧,表示实际进度超前
C．粗黑线右端位于检查日期线左侧,表示实际进度超前
D．粗黑线右端位于检查日期线左侧,表示实际进度拖后
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An analog signal's characteristic quantity representing data may 66). at any instant, any value within a continuous(67). For example, an analog signal may follow continuously the values of another physical quantity representing data.A discrete signal is composed of(68)elements in time, each element having one or more characteristic quantities which can represent data. Examples of characteristic quantities are amplitude, waveform,(69), and position in time. A digital signal is a special case of discrete signals, in which data are represented by a(70)number of well-defined discrete values that one of its characteristic quantities may take in time.A．acquireB．collectC．assumeD．fetch
A.A
B.
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