2023山东省青岛二中高三上学期1月期末数学答案

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7.C【解析】因为AC⊥BF,AC⊥EF,BF∩EF=F,所以AC⊥平面EFBB1,所以P到平面EFBB1的距离为AF=1,又因为Sm=2,所以vpm.=11×2=2.故选C

    C.和平与发展是世界主题的理念的提出            D.俄罗斯与中国重新建立了外交关系

        【解题分析】20世纪80年代中期,邓小平提出“和平与发展是当代世界的两大问题”,1989年中苏关系恢复正常化,故C项正确。中西关系的紧张是新中国成立初期至20世纪60年代末,排除A项;中国恢复联合国合法席位是在1971年,排除B项;俄罗斯与我国建交是苏联解体之后,排除D项【答案】C

第二节(满分25分)One possible versionSuddenly I missed a step and fell into the pool. I was extremely scared, struggling in thewater.Seeing what had happened, Jack swiftly reached out his right hand, but unfortunatelybeyond my reach. Then he immediately picked up a stick from behind and gave the other end tome. However, the bank of the pool was too slippery and I was too scared to move. Calm downGrab at it firmly! "Jack encouraged in a loud voice. With his help and all my strength, Isuccessfully got outThere was not much time left for the return trip. Afraid of missing the boat back, Jackdragged me to the pier in a hurry. Meanwhile, I was looking back once in a while for fear that abeast might catch us up. We managed to catch the return boat finally but I had not yet gol overthe scare. Frightened and tired as I was, I congratulated myself on returning safe and sound. Mbrother and I harvested a meaningful exploration and really spent a brand new weekend.

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