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【单选题】
义齿选磨时，正中合一侧上颌舌牙尖早期接触，侧向合平侧也有早期接触， 磨？（）A.
上颌舌牙尖
B.
下颌舌牙尖
C.
上颌颊牙尖
D.
下颌颊牙尖
E.
下颌中央窝
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【简答题】在汛期，水库、闸坝和其他水工程设施的运用，必须服从有关的防汛指挥机构的调度指挥和监督。 判断对错
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【简答题】Mr. and Mrs. White had two sons and three daughters. One Sunday, Mrs. White said to her husband. The children don' t have any lessons today, and you're free too. There's a new funfair（游乐场） in the park...
【多选题】在汛期，水库、闸坝和其他水工程设施的运用，以下说法正确的是（）。
A.
必须服从有关的防汛指挥机构的调度指挥和监督
B.
在汛期，水库不得擅自在汛期限制水位以上蓄水
C.
其汛期限制水位以上的防洪库容的运用，必须服从防汛指挥机构的调度指挥和监督
D.
在凌汛期，有防凌汛任务的江河的上游水库的下泄水量必须征得有关的防汛指挥机构的同意，并接受其监督
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