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【单选题】
参数 的估计量 具备有效性是指( )A.
B.
在 的所有线性无偏估计中 最小
C.
D.
在 的所有线性无偏估计中 最小
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举一反三
【单选题】Moon cakes, ________the moon, are round. [ ]
A.
look like
B.
looks like
C.
like
D.
likes
【简答题】A．To gather under the moon, drink tea and eat moon cakes. B．To honor their ancestors and their mother country. C．To enjoy the full moon at night in August. D．To have family get together.
【单选题】Moon cakes used to be _____ when people went outside to admire the fair moon.
A.
the snack
B.
the gift to exchange
C.
the sacrifice offered to the moon
D.
the symbol of the moon
【简答题】肺癌最常见的病理类型是 （ ）
【单选题】After dinner we sit outside to() the full moon and the moon cakes.
A.
enjoy
B.
like
C.
love
【简答题】296÷39，把39看做（ ）试商。
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