皮皮学，免费搜题
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搜题
【单选题】
若【图片】采样频率为256Hz，N＝512点。若加矩形窗叶变换后显示的频率为 Hz。A.
95.5
B.
256.0
C.
96.0
D.
100.0
E.
67.7
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皮皮学刷刷变学霸
举一反三
【单选题】My mother usually has_______ bed.
A.
the breakfast in
B.
breakfast in
C.
the breakfast in the
D.
breakfast in the
【单选题】My mother usually on weekends. [ ]
A.
make the laundry
B.
makes the laundry
C.
do the laundry
D.
does the laundry
【简答题】( ) 是世界上最大的咖啡主要生产国和出口国,生产量占世界总量30%。
【单选题】My mother usually _____ at ten-thirty iri the evening. [ ]
A.
has breakfast
B.
gets up
C.
watches morning TV
D.
goes to bed
【单选题】My mother usually gets up 30 minutes ____ than me every day. [ ]
A.
early
B.
earlier
C.
earliest
D.
the earliest
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