题目
FREQUENCY为计算频率的函数。()
第2题
RFM法(Recency,Frequency和Monetary,分别代表近期性、购买频率、购买币值)。()
第3题
LTE室外同频组网下的频率规划演变成基于『____』的ICIC。(The frequency plan evolved into the ICIC based『____』in LTE network with the same frequency.)
第6题
已知一正弦电压的幅值为310V,频率为50Hz,初相为
(1)写出此正弦电压的时间函数表达式;
(2)计算t=0,0.0025s,0.0075s,0.0100s,0.0125s,0.0175s的电压瞬时值;
(3)绘出波形图.
第11题
A.消费次数(Frequency)
B.消费频率(Frequency)
C.消费金额(Monetary)
D.最近一次消费(Recency)
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