题目内容

招标控制价应在招标时公布,不应上调但可以下浮。( )

A. 对
B. 错

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在统计中,常用大写字母来表示随机变量,小写字母来表示随机变量的观测值(样本),一组观测值称为随机变量的一组样本,已知某随机变量及其一组观测值(样本)如下表:现在R语言中计算其样本均值和样本方差,在R语言中计算均值的函数是__________,X的样本均值为__________,(精确到两位小数),计算方差的函数是___________,X的样本方差为__________.

How can you be _______ to the suffering of starving people?

A. indifferent
B. inevitable
C. peculiar
D. different

The dull party finally ________ when a famous band arrived.

A. came to life
B. came to light
C. came to hand
D. came to mind

The TV program ________the aftermath of the Paris terrorist attacks.

A. attracts
B. appeals
C. highlights
D. fascinates

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