选择题:I’m disappointed with the new officers elected in

题目内容:
I’m disappointed with the new officers elected in our club, but there is no point _______ about it.

Ato worry
Bin worrying
Cwith us worrying
Dif we worry
参考答案:

半数平均法的数学依据是变量的实际值与理论值的离差平方和为最小。A、正确B、错误

半数平均法的数学依据是变量的实际值与理论值的离差平方和为最小。A、正确B、错误

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