金太阳全国100所名校答案英语

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全国100所名校高考模拟示范卷文科数学七

5.ABC【解析】因为直线l1:ax-y十1=0，l2:x十ay+1=0,所以a·1十（一1）·a=0,则不论a为何值，1与2都互相垂直，故A正确；因为直线l:ax=y-1,当a变化时，直线l1过定点A(0,1),直线l2:x十1=一ay,当a变化时，直线l2过定点B(一1,0)，故B正确；如下图所示：M易知∠AOB=∠AMB=90°，所以A、O、B、M四点共圆，且该圆的直径为AB|=√TOA2+OB下=√2，所以，当MO为该圆的直径时，|MO取得最大值√2，故C正确；在l1上任取点(x,ax+1),可知点(x,ax十1)关于直线x十y=0对称的点的坐标为（一ax一1，一x),可知点(-ax-1,一x)不在L2:x十ay+1=0上，故D不正确.故选ABC.

高一化学全国100所名校答案解析

第二骨I screamed and wept bitterly in bed,All that erying finally releosed my uncontrollableangcr.As I calmed down and my breathing bccamc regular.the day's events began tounfold in my mind,A sharp pang of fault hit me.Why had I treated Mother as a Larget torelease my anger?If I had shared about my woes.Mother would have listened.The more Ithought about my actions,the heavier my heart felt.Then,I heard strange sounds comingfrom the kitchen.P'uzzled.I opened my bedroom door,tiptoeing towards the kitehen.Then a thick,juicy smell of hamburgers greeted my nose,Sensing my footsteps.Mother looked up,asking tentatively,"Want some?"I took a bite guiltily,sheddingregretful tears."Mom.I'm awfully sorry for being awful to you today.I had a bnd day atschool.I don't deserve this.I apologized."I should have guessed you're in a tough spot.sorry,honey.I remember those growing up years."Mother smiled and gave me a bearhug.There was nothing like mother's unconditional love-that night,I should have beenpunished;instead,Mother dished up a hearty portion of grace.