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【判断题】
非周期变化的信号就是随机信号( )A.
正确
B.
错误
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参考答案：
参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】Section III of the ADMIRALTY NOTICES TO MARINERS is .
A.
Reprints of Radio Navigational Warnings
B.
Amendments to Admiralty Sailing Directions
C.
Amendments to Admiralty Lists of Lights and Fog Signals
D.
Amendments to Admiralty List of Radio Signals
【简答题】III. Reading Comprehension：31% Section A Directions: For each blank in the following passage there are four words or phrases marked A, B, C and D. Fill in each blank with the word or phrase that fits ...
【简答题】________________ for their wedding, they haven’t had a rest for several weeks. A. Devoted to preparing B. Devoted to prepare A. Devoting to prepare D. Devoting to prep...
【单选题】Several weeks had gone by _______ I knew the painting was missing.
A.
as
B.
since
C.
until
D.
before
【简答题】是改变物体运动状态的原因。
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