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單項選擇題

下列哪一種不是常規(guī)的水基修井液/完井液（）

A.清水
B．溴化鋅
C．氯化鉀
D．氯化鈣

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Ludwig van Beethoven is mentioned as an example of some famous failurs in the text to prove that ___.

A、some failure for some people at ceratin times can be motivating
B、famous persons tackle failures more successfully
C、only famous persons take failure as their new beginning
D、failures are not easy task for common people

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運營公司防汛紅色預(yù)警對應(yīng)（）狀態(tài)

A.高度戒備
B．臨戰(zhàn)
C．緊急
D．戒備

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