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【单选题】
可以证明电子具有波动性的实验证据是A.
电子具有动量
B.
电子具有质量
C.
电子可以定向传输
D.
电子流在衍射实验中有衍射环
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反馈参考答案：
举一反三
【单选题】When preparing an engine for water temperature .
A.
should be kept at a proper level by a cooler
B.
should be raised to about 80℃ by a heater
C.
should be raised gradually
D.
should be lowered to about 60℃
【单选题】The highest level of commercial navigational accuracy is provided by ().
A.
DGPS，within a coverage area
B.
SPS，without selective availability
C.
PPS，without selective availability
D.
NAVSAT，using the Doppler-shift
【判断题】Error propagation is a drawback with correlative-level coding, and is unavoidable.
A.
正确
B.
错误
【判断题】Correlative-level coding uses a partial-response signaling method to avoid inter-symbol interference (ISI).
A.
正确
B.
错误
【简答题】Bar Co is a stock exchange listed company that is concerned by its current level of debt finance. It plans to make a rights issue and to use the funds raised to pay off some of its debt. The rights is...
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