题目

We ________ time ,so we must end the meeting at once .A. gave out B. looked out of C. ran out D. ran out of 答案:【答案】D【解析】句意:我们用完了时间,因此我们必须马上结束会议。根据A. gave out分发,发表;B. looked out of向---外看;C. ran out用完,不及物动词短语,后面不接宾语;D. ran out of用完……,能接宾语,根据so we must end the meeting at once可知是时间用完了,根据有宾语time;故选D。设数列;    (1)证明:数列是等比数列;    (2)设数列的公比求数列的通项公式;    (3)记;
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