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搜题
【单选题】
信号f(5-3t)是（ ）。A.
f(3t) 右移5
B.
f(3t) 左移5/3
C.
f(-3t) 左移5
D.
f(-3t) 右 移5/3
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皮皮学刷刷变学霸
举一反三
【简答题】通过亚马逊卖家中心查看数据报告时,通过观察与分析各类数据报告,其数据的变化带给卖家哪些启示呢?
【单选题】My uncle brought his girlfriend to ____ my parents’ happy marriage with her own eyes at Christmas that year.
A.
practice
B.
appreciate
C.
experience
D.
witness
【简答题】The happy time with my girlfriend was really______(forget).
【单选题】---- Why are you in such a hurry? ---- My girlfriend ____ for Shanghai. I’m going to the airport to see her off.
A.
is leaving
B.
has left
C.
was leaving
D.
left