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【单选题】
以抽样指标估计总体指标要求抽样指标值的平均数等于被估计的总体指标本身，这一标准称为()A.
无偏性
B.
一致性
C.
有效性
D.
准确性
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参考解析：
知识点：
皮皮学刷刷变学霸
举一反三
【单选题】根据《建筑安装工程费用项目组成》,下列税金组合中,应计入建筑安装企业管理费的是( )。
A.
房产税、车船使用税、土地使用税、印花税
B.
营业税、房产税、车船使用税、土地使用税
C.
城市维护建设税、教育费附加、地方教育附加
D.
房产税、土地使用税、营业税
【单选题】The keeper of the spring cleared away the leaves and branches, and wiped away the silt(淤泥) that would _______ have choked and polluted the fresh flow of water.
A.
thus
B.
otherwise
C.
therefore
D.
later
【简答题】A plant(植物) makes its own food in its leaves .Water comes to the leaves through the roots（根）. Air gets into the leaves through very small holes（孔） . The green coloring in the leaves uses the water and...
【简答题】阅读理解。 A plant (植物) makes its own food in its leaves, water comes to the leaves through the roots (根), air gets into the leaves through very small holes (孔), the green coloring in the leaves uses the w...
【简答题】阅读理解。 A plant (植物) makes its own food in its leaves.Water comes to the leaves through the roots (根). Air gets into the leaves through very small holes (孔). The green coloring in the leaves uses the wa...
【单选题】当程序中出现 F150,表示
A.
进给率为 150r/min
B.
进给速度为 150mm/min
C.
给量为 150mm/min
D.
进给速度为 150m/min
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