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Mary , the daughter of my friend , was going to university next year.She is kind - hearted 26 just a bit shy.When her birthday was around the corner I found out she was feeling a bit 27 and lonely.Her family is quite small and finances are tight , so perhaps there wouldn't be any birthday 28 . I thought sending her a small gift may 29 her day a bit.I got her school 30 from her Mom and planned to give her a 31 . I found out a small 32 and asked three other people in my area to sing Happy Birthday and send some birthday wishes to her.It was such 33 making the recording! Other people realized what we were doing and 34 their voices , so it really sounded like we had a 35 going on! Then I bought some colorful balloons , cakes , and a small present for her as 36 planned. I was delighted to 37 them(the tape , the present ... )into a box.I opened the balloons and 38 everything so it was like opening a mini birthday party! At last I 39 it off! I 40 a call a few days later.Mary told me that her roommate and a neighbor in the dormitory kept her 41 and held the party for her once the box 42 .Another girl from the nearby dorm 43 them and then the celebration came up! She sounded so happy and I was so glad that she had some friends to share her 44 day with. The friends who joined us to prepare the birthday gift 45 laugh today and talk about it.Mary said she would remember the special birthday gift forever!
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【简答题】已知平面直角坐标系中,A、B、C三点的坐标分别是(0,2)、(0,-2),(4,-2). (1)请在给出的直角坐标系xOy中画出△ABC,设AC交X轴于点D,连接BD,证明:OD平分∠ADB; (2)请在x轴上找出点E,使四边形AOCE为平行四边形,写出E点坐标,并证明四边形AOCE是平行四边形; (3)设经过点B,且以CE所在直线为对称轴的抛物线的顶点为F,求直线FA的解析式.
【简答题】在平面直角坐标系xOy中,以O为极点,X轴的正半轴为极轴,取与直角坐标系相同的长度单位建立极坐标系.曲线C 1 的参数方程为: ( 为参数);射线C 2 的极坐标方程为: ,且射线C 2 与曲线C 1 的交点的横坐标为 (I )求曲线C 1 的普通方程; (II)设A、B为曲线C 1 与y轴的两个交点,M为曲线C 1 上不同于A、B的任意一点,若直线AM与MB分别与x轴交于P,Q两点,求证|OP|...
【简答题】用最简分数表示:1小时15分钟=______小时.
【单选题】冬季开窗通风的时间是每次()。
A.
6小时
B.
3小时
C.
1小时
D.
15分钟左右
【简答题】将下列结果用分数表示: 1小时15分钟=______小时;1.15小时=______小时.
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【单选题】人体运动时的直接能源来自体内下列何种能源物质?
A.
三磷酸腺苷( ATP )
B.
脂肪
C.
D.
蛋白质
【简答题】算一算. (1)6小时35分钟+55分钟=______小时______分钟 (2)7小时28分钟+2小时35分钟=______小时______分钟 (3)3小时25分钟+12小时35分钟=______小时______分钟 (4)18分钟19秒+3分钟52秒=______分钟______秒.
【简答题】算一算. (1)9小时-6小时15分钟=______小时______分钟 (2)21小时32分钟-16小时49分钟=______小时______分 (3)8小时-5小时12分钟=______小时______分钟 (4)11小时28分钟-2小时12分钟=______小时______分钟 (5)18分钟31秒-6分钟45秒=______分钟______秒钟.
【简答题】在平面直角坐标系xOy中,以O为极点,X轴的正半轴为极轴,取与直角坐标系相同的长度单位建立极坐标系.曲线C 1 的参数方程为: x=acosφ y=sinφ (φ为参数);射线C 2 的极坐标方程为:θ= π 4 ,且射线C 2 与曲线C 1 的交点的横坐标为 6 3 (I)求曲线C 1 的普通方程; (II)设A、B为曲线C 1 与y轴的两个交点,M为曲线C 1 上不同于A、B的任意一点,若直线...
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