1、河北省秦皇岛市某校2024-2025学年第一学期期中演练九年级物理试题1、明思教育·河北省2024-2025学年度第一学期七年级教学质量检测二生物试题1、河北省2024-2025学年第一学期九年级教学质量检测二语文答案
A.甲中含氧官能团5种B.甲、乙均属F烃C.用酸性KMnO溶液可检验乙中的碳碳双键D.1mol甲与足量钠反应能生成2molH216.(15Fer所示。MnOPFeSo(aq)下列叙述错误的是H,SO(aq)A.电极b发生氧化反应B.电极a:MnO2+4H++2eMn++2H0C.随着反应进行,电解质溶液pH不断降低D.放电时,电子由电极b经外电路流向电极a二、非选择题:本题共4小题,共58分。NaBr溶液Na,CO溶液海水(含NaBr稀硫酸溴粗溴试剂1NaBr和NaBrO溶液和MgSO)试剂2Mg(OH)熔融MgMgCI溶液无水MgCl电解回答下列问题:(1)从产品来源和成本角度考虑,试剂1宜选择(填字母)。A.氨水B.生石灰C.NaOH(2)上述提溴流程中,运用了元素周期律的事实是(用离子方程式表示)。(3)用NaCO溶液吸收粗溴,还有CO2生成,其离子方程式为。NaBr和NaBrO反应制备Br,氧化产物与还原产物的质量之比为B0(4)如果上述流程中得到的粗溴中含少量CL,提纯溴的方法是和足量SOCI混合加热得到MgCl2。写出第二步反应的化学方程式:Mg·6Hts0c#化学试题第5页(共8页)
1、金科大联考·2024-2025学年度10月质量检测(25104B)历史试题1、河北省2024-2025学年第一学期八年级学业水检测一政治试题1、河北省2025届高三年级大数据应用调研联合测评(I)政治试题1、河北2、安徽省芜湖市2024-2025学年度第一学期九年级素质教育评估试卷政治答案1、安徽省芜湖市2024-2025学年度第一学期九年级素质教育评估试卷政治答案1、抚州市2023-2024学年度上学期高二学生学业质量监测数学答案
1、河北省秦皇岛市某校2024-2025学年第一学期期中演练九年级数学试题1、河北省秦皇岛市某校2024-2025学年第一学期期中演练九年级物理答案1、安徽省2025届高三第一学期开学质量检测(8月)生物试题1、2、百师联盟·2025-2026学年度高三9月调研考试生物答案1、九师联盟2026届高三年级9月联考(G)生物答案ABDUCD3114D013日##发发生氧化进行光呼吸,具体过程如图所示。下列有关说法正确的是CO,ORuBPRuBPC3、河北省秦皇岛市某校2024-2025学年第一学期期中演练九年级物理试题1、河北省秦皇岛市某校2024-2025学年第一学期期中演练九年级物理答案1、河北省秦皇岛市某校2024-2025学年第一学期期中演练九年级化学试题
1、明思教育·河北省2024-2025学年度第一学期七年级教学质量检测二历史答案1、河南省2024-2025学年第一学期七年级学情分析二地理答案1、河南省2024-2025学年上学期八年级阶段性学情分析(一)英语试题《双语学2、安徽省芜湖市2024-2025学年度第一学期九年级素质教育评估试卷政治答案1、安徽省芜湖市2024-2025学年度第一学期九年级素质教育评估试卷政治答案1、[益卷]2024-2025学年度第一学期九年级课后综合作业(二)物理试题
1、明思教育·河北省2024-2025学年度第一学期七年级教学质量检测二语文试题1、明思教育·河北省2024-2025学年度第一学期七年级教学质量检测二历史答案1、河北省2024-2025学年第一学期七年级教学质量检测二地理答案
21:39865 551%KB/S数学(答案)卷一_Print...2025-2026学年自治区普通高考适应性检测月考试卷数学测试卷(-)参考答案一、二选择题:题号23567891011答案DABDBCCBBCDABDACD三、填空题:本大题共3小题,每小题5分,共15分12.213.-114.已四、解答题:本大题共5小题,共77分.解答应写出文字说明、证明过程或演算步骤,15.解:(1)83+(24π-√2)+(3-π)²27+|3-π|4-9×1+1+π-33=π-1;···(2)p=(1g5)²+1g21g5+1g4=1g5(1g5+1g2)+1g2=1g5+1g2=1,q =41²= 2,r=log4×log3=ln4ln32ln2ln3ln31n2ln3ln2=2所以p+q-r=1+2-2=1.*13分16.解:(1)由f(x)>(2-α)x-1整理得ax²-3x+2>0,因为不等式ax²-3x+2>0的解集为{xxb},所以1和b是方程ax²-3x+2=0的两个实数根,且α>0,所以a,解得=12b=2即a=1,b=2;4分(2)由(1)知α=1,于是有b=2’故2x+y=(2x+4+4x≥4+2√4=8x=2当且仅当_4x=1,即时,等号成立,依题意有(2x+y)≥k²+k+2,即8≥k²+k+2,2025-2026学年自治区普通高考适应性检测月考试卷数学测试卷(一)参考答案第1页共5页得k²+k-6≤0,即-3≤x≤2,所以k的取值范围为[-3.2];9分(3)由题意可得:f(x)=(ax-1)(x-1)0,令f(x)=0,解得x=或1,则有:当0
1.705G12:41 (17/s 51 100命题说明:数学试题参考答案及评分标准第1页共9页12.题源:人教A版必修第二册60页第8题.13.题源:2023 年新课标全国I卷14题.14.题源:原创.2aa由余弦定理:a²=b²+c²-2bcosA,b²+c²-2bccosA_5-4cosAbesin A sinA,其中y>0,则5= ysin A+4cosA=√y²+16sin(A+c),其中 tanp由于5≤√²+16,则y≥3,此时tan=tan A=解法2 过A作AH⊥BC,设AH=x,则BH=√4b²-x²,CH=√b²-x²,√4b²-x²+√b²-x²则bsinB##令1=b=+则y²-3t²=2y√²-1,则y+9t-6r²y²=4y²(t²-1),则9r-10y²t²+(y+4y²)=0,△=100y+-36y²(y²+4)≥0,则y²当y²-符合,从而的最小值为3:四、解答题:本题共5小题,共77分。解答应写出文字说明、证明过程或演算步骤。15.(13分)已知函数f(x)=a为奇函数(1)求α的值;(2)若f(x)
D.The best way is to replace them before they fail中XAnd the other is to reduce your daily energy usageSHave you created an eco-friendly home to make you suitable第三部分语言运用(共两节,满分30分)第一节(共15小题:每小题1分.满分15分)social issues.The environmental team 42rehabilitating the local river ecosystem. Armed with弥skies again made every drop of sweat 45封线carefully 488the word “horizon” in her notebook.on内ontraditional Chinese paper-cutting art activities. While teaching paper-cutting,Wefte不“Youthful 50heals deeper than medicine,he said.serlework isn't about changing the world51要1overnight.It‘s the small, consistent acts ofi 52that weave the social safety net.The答children's laughter as they learned new songs, the elderly’s smiles while sharing childhoodlebeauty of nature all taught me the true meaning of 54stories,rand the5355 us into more compassionate human beings.responsibility. This invisible curriculum题D.addresssiWB.avoidraise1.A.discussD.insisted onB.depended ononcentrated on42.A.moved onremovedD.documentedBmeasured43.A.detectedD.abandonedBshiningC.newA.meltingD.salty(CpowerfulB.meaninglessworthwhile45.B.ThereforeC.FinallyDJSurprisinglyMeanwhileC.capacity.strategyB.hunger47.A.respectC.tracingD.carvingBhiding48.A.deletingD.inspectedC.attendedemphasized49.A.prepared D.curiosityC.energycompassion50.A.wisdomC.educationD.group51.A.policekindnessD.faithB.competition52.A.profit【高二英语第8页(共10页)】
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