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【简答题】
一组图形按下面规律排列：△□□○○○△□□○○○…第50个图形是______，前100个图形中○有______个，当□有20个时，这组图形至少有______个．
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举一反三
【简答题】定位基准是指______________________________基准。
【单选题】他们试图预测这场足球比赛的结果。
A.
They wanted to know the result of the football match.
B.
They tried to forecast the result of the football match.
C.
They tried to forecast the result of the match.
【简答题】单端输出,具有 、_____ 、 、能较好地抑制温漂的差分放大电路。
【单选题】他们试图预测这场足球比赛的结果。
A.
They tried forecasting the result of the football match.
B.
They tried and forecasted the result of the football match.
C.
They tried to forecast the result of the football match.
【单选题】他们试图预测这场足球比赛的结果。
A.
They tried forecasting the result of the football match .
B.
They tried to forecast the result of the football match.
C.
They have tried to forecast the result of the football match .
【简答题】Translate the following sentences into English using the words or phrases in parentheses. 他们试图预测这场足球比赛的结果。 (forecast)
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