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若已知样本数据如下 , 回答以下问题 25 21 23 25 26 29 26 28 30 29 26 24 25 27 26 22 24 25 26 28 最大值为(),最小值为(),极差为();
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【简答题】One of the most popular literary figures in American literature is a woman who spent almost half of her life in China. In her lifetime she 1 the U.S.’s most highly acclaimed literary award, the Pulitz...
【单选题】Reading Comprehension During the contact between a doorman and a guest, they can strike up a conversation at anytime. The content may involve many things such as various services offered by the hotel,...
A.
Services offered by the hotel.
B.
Direction of a special place.
C.
Prices of commodities.
D.
All of the above.
【简答题】某直接序列扩频通信系统的码片速率为1.2288Mc/s，基带信号速率为19.2kbit/s，则其扩频因子SF= 。
【单选题】在设计基准期内始终存在且其量值变化与平均值相比可以忽略不计的作用或其变化是单调的并趋于某个限值的作用,称为( )。
A.
永久作用
B.
可变作用
C.
偶然作用
D.
地震作用
【单选题】( ) company refers to the name of Chinese enterprise who signs or executes the contract with its registered code of 10 figures in customs.
A.
foreign
B.
state
C.
Executive
D.
e xecutive
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