2024届广东省惠州市高三上学期第三次调研化学试题及答案

2024届广东省惠州市高三上学期第三次调研化学试题及答案,答案汇总网收集关于2024届广东省惠州市高三上学期第三次调研化学试题及答案的相关科目试卷及其答案，更多其他试卷答案请关注本网站！

参考范文：Together the neighbors sent the boys home.The parents of the children who had just arrived from workwere totally shocked to be informed of what had happened.They clearly knew what would have resulted in if itwere not for the neighbors timely help.They were very grateful to the neighbors who had helped to rescue thechildren and expressed their thankfulness again and again.Of course,all the neighbors sang high praise for whatI had done in that dangerous situation.I was very happy that I had been part of this act of neighborliness.It was a dangerous but unforgettablemoment,one I will always keep in mind.The neighbors there did not just stand by in time of danger.Instead,they reacted quickly.The neighbors,from whom I should learn,had been great.They had helped people in needwithout hesitation.I went home with a good feeling.After I shared my experience with my family,they wereshocked to hear it too.They were all for what I had done,and thumbed up for me.

三、解答题17.解:(1)由a1=1,a2=3,an-2an-1-1=0,得即A=1(1分)所以1=2(an-1+1),(3分)且a1+1=2(4分)所以{an+1}是以2为首项,2为公比的等比数列(6分(2)由(1)知an+1=2所以b=log2(an+1)=log2”=n(8分)所以二=1)(2n+12==1)”(2n+1)=6.6n+1(-1)"(+(10分)所以T=(-1-2)+(+3)+(-3一n2n+12n+12n+1·(12分)

22.【关键能力】本题考查逻辑思维能力、运算求解能力解:(1)圆C的圆心的直角坐标为(23COST623sing),即(3,3),所以圆C的直角坐标方程为(x-3)2+(y(2分)由p(+)+2=0,得1m-3pim+2=0又pcos6=x,psin=y,所以直线l的直角坐标方程为x-3y+4=0(5分)(2)易知点M(-4,0)在直线l上,且直线l的倾斜角为所以直线l的参数方程为(t为参(6分)代入(x-3)2+(y-3)2=9中,化简得2-83t+43=0.设A,B两点对应的参数分别为t1,,则t1+12=83,12=43(7分)点E对应的参数为2得|EM≈1t1+t2(8分)1MA|+MB1=12+1t212=(t1+t2)2-22=(83)2-2×43=106,则MA|2+1MB2-2MEF2=106-2×(43)2=10

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