2023届新高考湖南九校教学教研联盟高三年级联考化学参考答案

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2023届新高考湖南九校教学教研联盟高三年级联考化学参考答案试卷答案，以下是该试卷的部分内容或者是答案亦或者啥也没有

时比较,即可验证力的平行四边形定则。13.【解析】本题考查直线运动,目的是考查学生的推理能力。警车发动后做匀加速直线运动的时间为a=15s(1分)从警员发现货车至警车达到最大速度的过程中,货车和警车的位移大小分别为rt=t(t+t1)=400m,r21a12-=225m(2分)x>,故警车达到最大速度时尚未追上货车,且此时两车的距离为△r=x9-x=175m(2分)设警车达到最大速度后再用时间t追上货车,有21-08-2t2=△x+t2(1分又t=1+t2(L分)解得t=32、58。(1分)

4.B【解析】本题考查圆周运动,目的是考查学生的推理能力。A、B是同轴转动,周期相等,选项A错误;AO2OB,由v=可得A、B两处菜盘的线速度大小之此△=2,选项B正确:由a=(y可得A、B两处菜盘的向心加速度大小之比=2,选项C错误;因桌面水平,故菜盘受到的静摩擦力提供向心力,有f=ma可得A、B两处菜盘受到的静摩擦力大小之比mA,A=8,选项D错误

15.答案:(1)3.5(2)解析:(1)木块刚放在传送带上时,对木块由牛顿第二定律得:1mg=ma1,a1=2m/2加速时间:4=2=4s=2s(1分)加速的位移:x1=a14=×2×22m=4m(1分)木块与传送带共遠后做匀速直线运动;与速的时间21-x110=4s=1.55(1分)木块在传送带上运动的时间t=t1+12=3.5s(1分)(2)木块滑到平板车后,当滑到平板车最右端两者恰好共速时平板车长度最小对木块和小车系统由动量守恒定律得:mu=(M+m)v(1分)根据能量守恒定律H2mgLmin-2mu-2(M+m)uD),于(2分)解得:L==16(1分)

答案】BCD【解析】分析】详解】A.两物体变速运动时的加速度大A=2m/2根据t0.5s时,两滑块相距Ar=x(vt2A错误B.传送带启动物体的速度为v,-af=5m/s皮带速度相等所用时在t=1.5s时,甲滑块速度与皮带相等传送带启动时,乙物体的速度为n与皮带速度相等所用时间此在t1.5s时,乙滑块速度与皮带相等故1.5s时,两滑块速度相等,B正确C.0-0.5s内,乙相对传送带的位移大小at2=075mls-1.5s内,乙相对传送带的位移x2=w-(可+at)=1m因此0-1.5内,乙相对传送带的位移大小为x1=025mC正确D.甲相对传送带的位移d-y=6×1.5m-X2×15m-3×lm=37m滑块传送带间摩擦生热量g1=m18·知=7.5J乙滑块传送带间摩擦生热量e=m,g(n+x,=7J因此0-2.5s内,两滑块与传送带间摩擦生Q=g+C2=145JD正确BCD

【参考范文】One day, Spotty returned from his daily walk with a broken leg. Appearing exhausted, he came to myroom and sat near me, the leg bleeding. I called my mother and she quickly tied a bandage around his leg andgave him food to eat. I was very upset. But the next day, Spotty followed me wherever I went happily asusual though he limped a bit. After this incident my relation with Spotty became more intense. I reallyadmired him a lot for his courageAlmost a year later, one midnight we heard Spotty barking breathlessly. We rushed out and saw himbarking continuously, heading somewhere. After some time Spotty became quiet. I patted him on his backand came inside. The next morning, my heart skipped a beat when I didn't see Spotty. I searched for him ineach and every corner but in vain. And this time he had gone and would never come back. I cried and waitedfor him. But there were no signs of him and I only say him looking at me with his sparking eyes in my dream

1.D(本题中第一组成语“以柔克刚”,用柔软的去克制刚强的;“以静制动”,以冷静的态度对待纷乱的局面。根据语境第一处橫线应选填“以柔克刚”。第二组成语,“形神兼备”指书法和雕塑绘画作品等不但有美妙的形态且有神韵;“德容兼备”,指女子的品德和容貌都非常好。根据语境,第二处选用“形神兼备”。第三组成语“超然物外”指超出世俗生活之外,引申为置身事外;“超凡脱俗”指超岀常人,脱离凡俗,根据语境,第三处横线应选用“超然物外”。第四组成语“生生不息”,不断地生长、繁殖;“孳孳不息”形容工作勤奋,努力不懈。根据语境,第四处横线上应选用“生生不息”。故选D项)2.B(画线句子有三个毛病:一是整个句子缺少主语,应将第一个停顿改为“中国舞蹈以生命活动作为内涵”;二是介词缺失,应在“追求”前加“在”;三是宾语缺失,应在“解放”后加上“的境界”。只有B项全部修改正确,故选B项)3.B(A项中的破折号表示补充说明,C项中的破折号表示意思转折或递进,D项中的破折号表示转折;文中和B项中的破折号表示引起下文,上下文有解释说明的关系)