Children who are not active or ___diet is high in fat will gain weight quickly.

Who are happier, modern people or people in the past?  

常用的点估计是用样本均值估计总体均值，用样本比例估计总体比例，用样本方差估计总体方差。（　　）

常用的点估计是用样本均值估计总体均值，用样本比例估计总体比例，用样本方差估计总体方差。

可以在（）阶段采用Make-or-buy决策分析。

Brokers are those people, according to the passage, who buy or sell business shares for others.

Every deliberate act of wrongdoing by the master or any of the crew against the ship or cargo，without the authorization or privity of the Shipowner or his agent，is（）.

据联合国环境规划署估计，全球陆地面积的（）受到了荒漠化的危害。

Who do you like better, your father or mother? Why?

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。

样本比例是总体比例的（ ）A．无偏估计量B．一致估计量C．有偏估计量D．无效估计E．近似估计量

逻辑运算符（AND、NOT、OR）的运算顺序是AND→OR→NOT。