From ca2d4a455c9ae0e39e47edd3dd0c398f1b70b7ad Mon Sep 17 00:00:00 2001 From: "weiye.wang" Date: Thu, 4 Apr 2024 20:19:02 +0800 Subject: [PATCH] =?UTF-8?q?=E5=BD=95=E5=85=A5=E4=B8=80=E4=BA=9B=E7=AD=94?= =?UTF-8?q?=E6=A1=88?= MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit --- 工具v2/文本文件/metadata.txt | 496 ++++++++++++++++++++++++++++++++--- 题库0.3/Problems.json | 156 +++++------ 2 files changed, 542 insertions(+), 110 deletions(-) diff --git a/工具v2/文本文件/metadata.txt b/工具v2/文本文件/metadata.txt index 931dc1f6..ba6e58a9 100644 --- a/工具v2/文本文件/metadata.txt +++ b/工具v2/文本文件/metadata.txt @@ -40,10 +40,10 @@ $x=0\quad (-3\leq y \leq 3)$ $\dfrac{4}{3}$ 040952 -\\(1)$l$的斜率不存在$x=10$,舍\\(2)$5x-12y-38=0$或$3x+4y-34=0$ +\\(1)$l$的斜率不存在$x=10$, 舍\\(2)$5x-12y-38=0$或$3x+4y-34=0$ 040953 -\\(1)相交;\\(2)$\sqrt{3}x-y+1-\sqrt{3}=0$或$-\sqrt{3}x-y+1+\sqrt{3}=0$\\(3)$x(x-1)+(y-1)^2=0 (x\neq1)$ +\\(1)相交; \\(2)$\sqrt{3}x-y+1-\sqrt{3}=0$或$-\sqrt{3}x-y+1+\sqrt{3}=0$\\(3)$x(x-1)+(y-1)^2=0 (x\neq1)$ 040954 \\(1)$(x-1)^2+(y-\dfrac{1}{2})^2=\dfrac{5}{4}$\\(2)m=3 或 m=$-\dfrac{1}{3}$ @@ -145,7 +145,7 @@ $y=\dfrac{1}{2}x\pm\dfrac{\sqrt{66}}{2}$ $x^2-\dfrac{y^2}{15}=1\quad(x\geq0)$ 041063 -$\\(1)k\geq0$时,双曲线\\(2)$k=0$时,$y=0$\\(3)$k\leq0$且$k\neq-1$时,椭圆\\(4)$k=-1$时,圆 +$\\(1)k\geq0$时, 双曲线\\(2)$k=0$时, $y=0$\\(3)$k\leq0$且$k\neq-1$时, 椭圆\\(4)$k=-1$时, 圆 041064 $\\m=4\\S=\sqrt{3}$ @@ -195,10 +195,10 @@ A. C. 023106 -(1)略;(2)$\arccos\frac{31}{34}$;(3)$\pi-\arctan\frac{\sqrt{51}}{12}$. +(1)略; (2)$\arccos\frac{31}{34}$;(3)$\pi-\arctan\frac{\sqrt{51}}{12}$. 023107 -(1)略;(2)$\frac{1}{6}$;(3)$[\frac{21}{2},15]$. +(1)略; (2)$\frac{1}{6}$;(3)$[\frac{21}{2},15]$. 009305 (1)$x^{15}$,$-15x^{14}$,$105x^{13}$,$-455x^{12}$\\ @@ -214,7 +214,7 @@ $120$ 证明略 009317 -(1)第$18$,$19$项;\\ +(1)第$18$,$19$项; \\ (2)$\mathrm{C}_{35}^{27}3^{27}x^{27}$ 009319 @@ -376,13 +376,13 @@ A \textcircled{2} 021146 -总体是$2487$万人的年龄,样本是$24000$个常住居民的年龄,样本量是$24000$ +总体是$2487$万人的年龄, 样本是$24000$个常住居民的年龄, 样本量是$24000$ 021147 -观测,观测,实验 +观测, 观测, 实验 021148 -不可靠,样本容量太小,样本不一定具有代表性 +不可靠, 样本容量太小, 样本不一定具有代表性 021149 $2$ @@ -397,7 +397,7 @@ $a=b=10.5$ 平均值是$17$,方差是$27$ 021153 -平均数是$72.0$,中位数是$70$,方差是$74.9$ +平均数是$72.0$, 中位数是$70$, 方差是$74.9$ 021154 $\dfrac{n}{N}$ @@ -421,13 +421,13 @@ $4467$ $49,04,40,36,16,08,06,55,33,69$ 021161 -样本容量为$92$,抽样人数为$31$ +样本容量为$92$, 抽样人数为$31$ 021162 略 021163 -分层抽样,高一抽$18$人,高二抽$22$人,高三抽$10$人 +分层抽样, 高一抽$18$人, 高二抽$22$人, 高三抽$10$人 021164 C @@ -442,7 +442,7 @@ $0.32$,$96$ $300$ 021168 -集中,分散,$6.88$,$12.43$ +集中, 分散, $6.88$,$12.43$ 021169 \begin{tabular}{c|ccccccc} @@ -477,7 +477,7 @@ C A 021175 -甲更准,乙更稳定 +甲更准, 乙更稳定 021176 (1)$3.47$,(2)$2773$ @@ -489,7 +489,7 @@ $100$ (1)$9.5$;(2)不能 021182 -平均成绩是$89.6$,总体方差是$12.09$ +平均成绩是$89.6$, 总体方差是$12.09$ 023356 $A\subset C\subset B \subset E \subset D \subset G$;$E \subset F \subset G$ @@ -582,7 +582,7 @@ $D$. $D$. 023121 -(1)略;(2)略. +(1)略; (2)略. 023122 略. @@ -780,13 +780,13 @@ $A$ $D$ 023178 -$(1)$略;$(2)\frac{\sqrt{14}}{14}$ +$(1)$略; $(2)\frac{\sqrt{14}}{14}$ 023179 $(1)\frac{\pi}{6};(2)arccos\frac{\sqrt{3}}{3}$ 023180 -$(1)$略;$(2)arctan\frac{\sqrt{6}}{2}$;$(3)$略;$(4)\frac{\sqrt{2}}{6}$ +$(1)$略; $(2)arctan\frac{\sqrt{6}}{2}$;$(3)$略; $(4)\frac{\sqrt{2}}{6}$ 023181 无 @@ -813,22 +813,22 @@ $\frac{\pi}{6}$. $\frac{15\sqrt{3}}{2}$ 017677 -$DM\perp PC$(或$BM\perp PC$) +$DM\perp PC$(或$BM\perp PC$) 023188 \textcircled{1}\textcircled{2}\textcircled{4} 023189 -(1)略;(2)$arccos\frac{\sqrt{15}}{5}$ +(1)略; (2)$arccos\frac{\sqrt{15}}{5}$ 023190 -(1)略;(2)6. +(1)略; (2)6. 023191 $S=\begin{cases}\frac{1}{2cos\alpha},\quad\alpha\in(0,arctan\sqrt{2}]\\ \frac{\sqrt{2}-cot\alpha}{sin\alpha},\alpha\in(arctan\sqrt{2},\frac{\pi}{2}]\end{cases}$ 023192 -(1)略;(2)$\frac{2\sqrt{6}}{3}$. +(1)略; (2)$\frac{2\sqrt{6}}{3}$. 023193 $8$. @@ -846,7 +846,7 @@ $arctan\sqrt{2}$. $10.$ 023198 -$(1)$外心;$(2)$内心;$(3)$垂心. +$(1)$外心; $(2)$内心; $(3)$垂心. 023199 $\sqrt{3}$ @@ -867,7 +867,7 @@ $S=32,V=16$. $\frac{2\sqrt{11}}{11}$. 023205 -$(1)$略;$(2)\frac{5}{3}$. +$(1)$略; $(2)\frac{5}{3}$. 023206 $(1)V=a^2;(2)$\textcircled{1}$\frac{\sqrt{51}}{9}$;\textcircled{2}$\frac{\sqrt{30}}{3}$. @@ -921,7 +921,7 @@ $\theta_{min}=\pi-arctan\frac{4}{3}$,此时$P$ 在线段 $A_1C_1$ 的中点. 略. 023223 -$(1)$略;$(2)arctan\sqrt{2}$;$(3)$是,$\frac{\sqrt{6}}{24}$. +$(1)$略; $(2)arctan\sqrt{2}$;$(3)$是, $\frac{\sqrt{6}}{24}$. 023224 $P^{6}_{20-m}$. @@ -961,7 +961,7 @@ $a_{n}=\begin{cases}2-a,n=1 \\2^{n-1},n\geq2 $(-\frac{1}{11},-\frac{1}{19})$. 023236 -(1)略;(2)$S_{n}=\frac{2}{3}-(n+\frac{2}{3})(\frac{1}{4})^{n}$;(3)$(-\infty,-5]\cup[1,+\infty)$. +(1)略; (2)$S_{n}=\frac{2}{3}-(n+\frac{2}{3})(\frac{1}{4})^{n}$;(3)$(-\infty,-5]\cup[1,+\infty)$. 023237 $1716$. @@ -1015,19 +1015,19 @@ $92$. (1)$a_n=\frac{2}{n+1}$;(2)$a_n=2\cdot3^{n-1}-1$;(3)$a_n=2^n-1$;(4)$a_n=\begin{cases}2,n=4k-3 \\-3,n=4k-2\\-\frac{1}{2},n=4k-1\\\frac{1}{3},n=4k\end{cases}\ \ \ \ \ ( k\in \mathbf{N}$且$k\ge1)$ 023253 -(1)不是;(2)最大项为$a_3=a_4=20$. +(1)不是; (2)最大项为$a_3=a_4=20$. 022570 -(1)$2$;(2)存在,$N=22$. +(1)$2$;(2)存在, $N=22$. 022572 $S_n=(n-1)\cdot3^n+1$. 023254 -(1)第$16$项;(2)$b_n=3\cdot2^n+1$. +(1)第$16$项; (2)$b_n=3\cdot2^n+1$. 023255 -(1)略;(2)$a_n=\begin{cases} +(1)略; (2)$a_n=\begin{cases} \frac{1}{2},n=1\\-\frac{1}{2n(n-1)},n\geq2 \end{cases}$ @@ -1563,7 +1563,7 @@ $\dfrac{x^2}{20}-\dfrac{y^2}{16}=1$ $\dfrac{x^2}{33-12\sqrt{6}}-\dfrac{y^2}{12\sqrt{6}-8}=1$或$\dfrac{y^2}{16}-\dfrac{x^2}{9}=1$ 021225 -不正确,正确结果为$17$ +不正确, 正确结果为$17$ 021226 $\dfrac{x^2}{115600}-\dfrac{y^2}{134400}=1$ @@ -1647,7 +1647,7 @@ $x^2-4y^2=\pm \dfrac{36}{5}$ $(-\dfrac{\sqrt{15}}{3},-1)$ 021260 -(1)椭圆:$k<4$,双曲线:$4\dfrac{\sqrt{6}}{2},e\neq \sqrt{2}$;(2)$\dfrac{17}{13}$ +ans + +032128 +$(0,1]$ + +032129 +$\dfrac{\pi}{3}$ + +032130 +$-\dfrac{5}{2}i$ + +032131 +$-\dfrac{1}{2}$ + +032132 +$y=-\dfrac{1}{4}$ + +032133 +1 + +032134 +$\dfrac{1}{3}$ + +032135 +44 + +032136 +$35+2\sqrt{82}$ + +032137 +643 + +032138 +1289 + +032139 +24 + +032140 +B + +032141 +A + +032142 +C + +032143 +C + +032144 +(1)略; (2)$\sqrt{2}$ + +032145 +(1)95.8;(2)0.72 + +032146 +(1)直角三角形; (2)$4+4\sqrt{2}$ + +032147 +(1)$\sqrt{2}$;(2)略; (3)$(9x^2+5y^2)^2+162x^2-50y^2=0(y\neq 0)$ + +032148 +(1)略; (2)$a\geq \dfrac{1}{8}$时, $f(x)$在$(0,+\infty )$单调增; $02.1$,可以达到 + +022869 +(1)$1$; (2)$(0,\arctan\dfrac{1}{2})$ + +022870 +(1)$6$; (2)正确, 证明略 + +019887 +$-\dfrac{1}{4}$ + +019888 +$\dfrac{1}{2}$ + +019889 +3 + +019890 +$[-\dfrac{1}{2},\dfrac{1}{2}]$ + +023003 +C + +019891 +A + +023004 +4 + +023005 +B + +023006 +C + +019900 +1 + +019901 +3 + +019902 +2 + +019903 +$-\dfrac{1}{2}$ + +019904 +D + +004438 +C \ No newline at end of file diff --git a/题库0.3/Problems.json b/题库0.3/Problems.json index 3e723689..0a96bd6b 100644 --- a/题库0.3/Problems.json +++ b/题库0.3/Problems.json @@ -267051,7 +267051,7 @@ "H20250331-二项式定理(2)" ], "genre": "解答题", - "ans": "(1)第$18$,$19$项;\\\\\n(2)$\\mathrm{C}_{35}^{27}3^{27}x^{27}$", + "ans": "(1)第$18$,$19$项; \\\\\n(2)$\\mathrm{C}_{35}^{27}3^{27}x^{27}$", "solution": "", "duration": -1, "usages": [ @@ -494164,7 +494164,7 @@ "W20250306-2025届高二上学期周末卷06" ], "genre": "填空题", - "ans": "$DM\\perp PC$(或$BM\\perp PC$)", + "ans": "$DM\\perp PC$(或$BM\\perp PC$)", "solution": "", "duration": -1, "usages": [], @@ -588256,7 +588256,7 @@ "H20250338-总体与样本、数据的获取" ], "genre": "解答题", - "ans": "总体是$2487$万人的年龄,样本是$24000$个常住居民的年龄,样本量是$24000$", + "ans": "总体是$2487$万人的年龄, 样本是$24000$个常住居民的年龄, 样本量是$24000$", "solution": "", "duration": -1, "usages": [ @@ -588292,7 +588292,7 @@ "H20250338-总体与样本、数据的获取" ], "genre": "填空题", - "ans": "观测,观测,实验", + "ans": "观测, 观测, 实验", "solution": "", "duration": -1, "usages": [ @@ -588328,7 +588328,7 @@ "H20250338-总体与样本、数据的获取" ], "genre": "解答题", - "ans": "不可靠,样本容量太小,样本不一定具有代表性", + "ans": "不可靠, 样本容量太小, 样本不一定具有代表性", "solution": "", "duration": -1, "usages": [ @@ -588510,7 +588510,7 @@ "H20250338-总体与样本、数据的获取" ], "genre": "解答题", - "ans": "平均数是$72.0$,中位数是$70$,方差是$74.9$", + "ans": "平均数是$72.0$, 中位数是$70$, 方差是$74.9$", "solution": "", "duration": -1, "usages": [ @@ -588793,7 +588793,7 @@ "H20250339-抽样方法" ], "genre": "解答题", - "ans": "样本容量为$92$,抽样人数为$31$", + "ans": "样本容量为$92$, 抽样人数为$31$", "solution": "", "duration": -1, "usages": [ @@ -588869,7 +588869,7 @@ "H20250339-抽样方法" ], "genre": "解答题", - "ans": "分层抽样,高一抽$18$人,高二抽$22$人,高三抽$10$人", + "ans": "分层抽样, 高一抽$18$人, 高二抽$22$人, 高三抽$10$人", "solution": "", "duration": -1, "usages": [ @@ -589043,7 +589043,7 @@ "H20250340-统计图表" ], "genre": "填空题", - "ans": "集中,分散,$6.88$,$12.43$", + "ans": "集中, 分散, $6.88$,$12.43$", "solution": "", "duration": -1, "usages": [ @@ -589280,7 +589280,7 @@ "H20250341-统计估计" ], "genre": "解答题", - "ans": "甲更准,乙更稳定", + "ans": "甲更准, 乙更稳定", "solution": "", "duration": -1, "usages": [ @@ -589507,7 +589507,7 @@ "H20250341-统计估计" ], "genre": "解答题", - "ans": "平均成绩是$89.6$,总体方差是$12.09$", + "ans": "平均成绩是$89.6$, 总体方差是$12.09$", "solution": "", "duration": -1, "usages": [ @@ -590763,7 +590763,7 @@ "第七单元" ], "genre": "解答题", - "ans": "不正确,正确结果为$17$", + "ans": "不正确, 正确结果为$17$", "solution": "", "duration": -1, "usages": [ @@ -591824,7 +591824,7 @@ "第七单元" ], "genre": "解答题", - "ans": "(1)椭圆:$k<4$,双曲线:$42.1$,可以达到", + "ans": "(1)15户; (2)$x=5$时, $f(x)$最大值为$2.12>2.1$,可以达到", "solution": "", "duration": -1, "usages": [ @@ -643711,7 +643711,7 @@ "A20240505-2024届高三上124分守护卷05" ], "genre": "解答题", - "ans": "(1)$1$; (2)$(0,\\arctan\\dfrac{1}{2})$", + "ans": "(1)$1$; (2)$(0,\\arctan\\dfrac{1}{2})$", "solution": "", "duration": -1, "usages": [ @@ -643739,7 +643739,7 @@ "A20240505-2024届高三上124分守护卷05" ], "genre": "解答题", - "ans": "(1)$6$; (2)正确,证明略", + "ans": "(1)$6$; (2)正确, 证明略", "solution": "", "duration": -1, "usages": [ @@ -650656,7 +650656,7 @@ "E20250302-2025届高二上学期测验卷02" ], "genre": "解答题", - "ans": "(1)略;(2)$\\arccos\\frac{31}{34}$;(3)$\\pi-\\arctan\\frac{\\sqrt{51}}{12}$.", + "ans": "(1)略; (2)$\\arccos\\frac{31}{34}$;(3)$\\pi-\\arctan\\frac{\\sqrt{51}}{12}$.", "solution": "", "duration": -1, "usages": [], @@ -650679,7 +650679,7 @@ "E20250302-2025届高二上学期测验卷02" ], "genre": "解答题", - "ans": "(1)略;(2)$\\frac{1}{6}$;(3)$[\\frac{21}{2},15]$.", + "ans": "(1)略; (2)$\\frac{1}{6}$;(3)$[\\frac{21}{2},15]$.", "solution": "", "duration": -1, "usages": [], @@ -651003,7 +651003,7 @@ "W20250301-2025届高二上学期周末卷01" ], "genre": "解答题", - "ans": "(1)略;(2)略.", + "ans": "(1)略; (2)略.", "solution": "", "duration": -1, "usages": [], @@ -652333,7 +652333,7 @@ "W20250305-2025届高二上学期周末卷05" ], "genre": "解答题", - "ans": "$(1)$略;$(2)\\frac{\\sqrt{14}}{14}$", + "ans": "$(1)$略; $(2)\\frac{\\sqrt{14}}{14}$", "solution": "", "duration": -1, "usages": [], @@ -652379,7 +652379,7 @@ "W20250305-2025届高二上学期周末卷05" ], "genre": "解答题", - "ans": "$(1)$略;$(2)arctan\\frac{\\sqrt{6}}{2}$;$(3)$略;$(4)\\frac{\\sqrt{2}}{6}$", + "ans": "$(1)$略; $(2)arctan\\frac{\\sqrt{6}}{2}$;$(3)$略; $(4)\\frac{\\sqrt{2}}{6}$", "solution": "", "duration": -1, "usages": [], @@ -652588,7 +652588,7 @@ "W20250306-2025届高二上学期周末卷06" ], "genre": "解答题", - "ans": "(1)略;(2)$arccos\\frac{\\sqrt{15}}{5}$", + "ans": "(1)略; (2)$arccos\\frac{\\sqrt{15}}{5}$", "solution": "", "duration": -1, "usages": [], @@ -652611,7 +652611,7 @@ "W20250306-2025届高二上学期周末卷06" ], "genre": "解答题", - "ans": "(1)略;(2)6.", + "ans": "(1)略; (2)6.", "solution": "", "duration": -1, "usages": [], @@ -652660,7 +652660,7 @@ "W20250306-2025届高二上学期周末卷06" ], "genre": "解答题", - "ans": "(1)略;(2)$\\frac{2\\sqrt{6}}{3}$.", + "ans": "(1)略; (2)$\\frac{2\\sqrt{6}}{3}$.", "solution": "", "duration": -1, "usages": [], @@ -652798,7 +652798,7 @@ "W20250307-2025届高二上学期周末卷07" ], "genre": "填空题", - "ans": "$(1)$外心;$(2)$内心;$(3)$垂心.", + "ans": "$(1)$外心; $(2)$内心; $(3)$垂心.", "solution": "", "duration": -1, "usages": [], @@ -652961,7 +652961,7 @@ "W20250307-2025届高二上学期周末卷07" ], "genre": "解答题", - "ans": "$(1)$略;$(2)\\frac{5}{3}$.", + "ans": "$(1)$略; $(2)\\frac{5}{3}$.", "solution": "", "duration": -1, "usages": [], @@ -653379,7 +653379,7 @@ "W20250308-2025届高二上学期周末卷08" ], "genre": "解答题", - "ans": "$(1)$略;$(2)arctan\\sqrt{2}$;$(3)$是,$\\frac{\\sqrt{6}}{24}$.", + "ans": "$(1)$略; $(2)arctan\\sqrt{2}$;$(3)$是, $\\frac{\\sqrt{6}}{24}$.", "solution": "", "duration": -1, "usages": [], @@ -653688,7 +653688,7 @@ "W20250309-2025届高二上学期周末卷09" ], "genre": "解答题", - "ans": "(1)略;(2)$S_{n}=\\frac{2}{3}-(n+\\frac{2}{3})(\\frac{1}{4})^{n}$;(3)$(-\\infty,-5]\\cup[1,+\\infty)$.", + "ans": "(1)略; (2)$S_{n}=\\frac{2}{3}-(n+\\frac{2}{3})(\\frac{1}{4})^{n}$;(3)$(-\\infty,-5]\\cup[1,+\\infty)$.", "solution": "", "duration": -1, "usages": [], @@ -654092,7 +654092,7 @@ "W20250310-2025届高二上学期周末卷10" ], "genre": "解答题", - "ans": "(1)不是;(2)最大项为$a_3=a_4=20$.", + "ans": "(1)不是; (2)最大项为$a_3=a_4=20$.", "solution": "", "duration": -1, "usages": [], @@ -654117,7 +654117,7 @@ "W20250310-2025届高二上学期周末卷10" ], "genre": "解答题", - "ans": "(1)第$16$项;(2)$b_n=3\\cdot2^n+1$.", + "ans": "(1)第$16$项; (2)$b_n=3\\cdot2^n+1$.", "solution": "", "duration": -1, "usages": [], @@ -654140,7 +654140,7 @@ "W20250310-2025届高二上学期周末卷10" ], "genre": "解答题", - "ans": "(1)略;(2)$a_n=\\begin{cases}\n\\frac{1}{2},n=1\\\\-\\frac{1}{2n(n-1)},n\\geq2\n\\end{cases}$", + "ans": "(1)略; (2)$a_n=\\begin{cases}\n\\frac{1}{2},n=1\\\\-\\frac{1}{2n(n-1)},n\\geq2\n\\end{cases}$", "solution": "", "duration": -1, "usages": [], @@ -714342,7 +714342,7 @@ "第二单元" ], "genre": "解答题", - "ans": "", + "ans": "(1)$M=10+mx-x-10\\sqrt{x},1\\leq x\\leq 16,x\\in \\mathbf{N}$;(2)$[\\dfrac{7}{2},\\dfrac{9}{4}]$", "solution": "", "duration": -1, "usages": [], @@ -721699,7 +721699,7 @@ "第六单元" ], "genre": "填空题", - "ans": "", + "ans": "$2\\sqrt{2}\\pi$", "solution": "", "duration": -1, "usages": [], @@ -724861,7 +724861,7 @@ "第七单元" ], "genre": "选择题", - "ans": "", + "ans": "B", "solution": "", "duration": -1, "usages": [], @@ -749536,7 +749536,7 @@ "第一单元" ], "genre": "填空题", - "ans": "", + "ans": "$(-\\infty,2]$", "solution": "", "duration": -1, "usages": [ @@ -749566,7 +749566,7 @@ "第六单元" ], "genre": "填空题", - "ans": "", + "ans": "$2$", "solution": "", "duration": -1, "usages": [ @@ -749596,7 +749596,7 @@ "第二单元" ], "genre": "填空题", - "ans": "", + "ans": "$(0,4)$", "solution": "", "duration": -1, "usages": [ @@ -749626,7 +749626,7 @@ "第二单元" ], "genre": "填空题", - "ans": "", + "ans": "$10$", "solution": "", "duration": -1, "usages": [ @@ -749656,7 +749656,7 @@ "第二单元" ], "genre": "填空题", - "ans": "", + "ans": "$(-\\infty,\\dfrac{9}{4})$", "solution": "", "duration": -1, "usages": [ @@ -749686,7 +749686,7 @@ "第七单元" ], "genre": "选择题", - "ans": "", + "ans": "A", "solution": "", "duration": -1, "usages": [ @@ -749724,7 +749724,7 @@ "第三单元" ], "genre": "解答题", - "ans": "", + "ans": "(1)$\\pi$;(2)最大值为$1$, 最小值$-2$", "solution": "", "duration": -1, "usages": [ @@ -749754,7 +749754,7 @@ "第二单元" ], "genre": "解答题", - "ans": "", + "ans": "(1)证明略; (2)$[1,+\\infty)$;(3)存在, 例如: $r(x)=4\\sqrt{x},r(x)=\\dfrac{1}{4}\\log_2(x+1)$等", "solution": "", "duration": -1, "usages": [ @@ -749785,7 +749785,7 @@ "第一单元" ], "genre": "填空题", - "ans": "", + "ans": "$(-1,\\dfrac{5}{27})$", "solution": "", "duration": -1, "usages": [], @@ -749807,7 +749807,7 @@ "第七单元" ], "genre": "解答题", - "ans": "", + "ans": "(1)$\\dfrac{x^2}{4}+\\dfrac{y^2}{3}=1$;(2)6;(3)$3x+4y-2=0$", "solution": "", "duration": -1, "usages": [], @@ -750665,7 +750665,7 @@ "第一单元" ], "genre": "填空题", - "ans": "", + "ans": "$(0,1]$", "solution": "", "duration": -1, "usages": [ @@ -750700,7 +750700,7 @@ "第六单元" ], "genre": "填空题", - "ans": "", + "ans": "$\\dfrac{\\pi}{3}$", "solution": "", "duration": -1, "usages": [ @@ -750737,7 +750737,7 @@ "第五单元" ], "genre": "填空题", - "ans": "", + "ans": "$-\\dfrac{5}{2}i$", "solution": "", "duration": -1, "usages": [ @@ -750772,7 +750772,7 @@ "第三单元" ], "genre": "填空题", - "ans": "", + "ans": "$-\\dfrac{1}{2}$", "solution": "", "duration": -1, "usages": [ @@ -750807,7 +750807,7 @@ "第七单元" ], "genre": "填空题", - "ans": "", + "ans": "$y=-\\dfrac{1}{4}$", "solution": "", "duration": -1, "usages": [ @@ -750844,7 +750844,7 @@ "第八单元" ], "genre": "填空题", - "ans": "", + "ans": "1", "solution": "", "duration": -1, "usages": [ @@ -750879,7 +750879,7 @@ "第三单元" ], "genre": "填空题", - "ans": "", + "ans": "$\\dfrac{1}{3}$", "solution": "", "duration": -1, "usages": [ @@ -750914,7 +750914,7 @@ "第八单元" ], "genre": "填空题", - "ans": "", + "ans": "44", "solution": "", "duration": -1, "usages": [ @@ -750950,7 +750950,7 @@ "第五单元" ], "genre": "填空题", - "ans": "", + "ans": "$35+2\\sqrt{82}$", "solution": "", "duration": -1, "usages": [ @@ -750985,7 +750985,7 @@ "第二单元" ], "genre": "填空题", - "ans": "", + "ans": "643", "solution": "", "duration": -1, "usages": [ @@ -751020,7 +751020,7 @@ "第四单元" ], "genre": "填空题", - "ans": "", + "ans": "1289", "solution": "", "duration": -1, "usages": [ @@ -751056,7 +751056,7 @@ "第七单元" ], "genre": "填空题", - "ans": "", + "ans": "24", "solution": "", "duration": -1, "usages": [ @@ -751091,7 +751091,7 @@ "第五单元" ], "genre": "选择题", - "ans": "", + "ans": "B", "solution": "", "duration": -1, "usages": [ @@ -751128,7 +751128,7 @@ "第五单元" ], "genre": "选择题", - "ans": "", + "ans": "A", "solution": "", "duration": -1, "usages": [ @@ -751163,7 +751163,7 @@ "第七单元" ], "genre": "选择题", - "ans": "", + "ans": "C", "solution": "", "duration": -1, "usages": [ @@ -751198,7 +751198,7 @@ "第六单元" ], "genre": "选择题", - "ans": "", + "ans": "C", "solution": "", "duration": -1, "usages": [ @@ -751233,7 +751233,7 @@ "第六单元" ], "genre": "解答题", - "ans": "", + "ans": "(1)略; (2)$\\sqrt{2}$", "solution": "", "duration": -1, "usages": [ @@ -751269,7 +751269,7 @@ "第八单元" ], "genre": "解答题", - "ans": "", + "ans": "(1)95.8;(2)0.72", "solution": "", "duration": -1, "usages": [ @@ -751304,7 +751304,7 @@ "第三单元" ], "genre": "解答题", - "ans": "", + "ans": "(1)直角三角形; (2)$4+4\\sqrt{2}$", "solution": "", "duration": -1, "usages": [ @@ -751341,7 +751341,7 @@ "第七单元" ], "genre": "解答题", - "ans": "", + "ans": "(1)$\\sqrt{2}$;(2)略; (3)$(9x^2+5y^2)^2+162x^2-50y^2=0(y\\neq 0)$", "solution": "", "duration": -1, "usages": [ @@ -751376,7 +751376,7 @@ "第二单元" ], "genre": "解答题", - "ans": "", + "ans": "(1)略; (2)$a\\geq \\dfrac{1}{8}$时, $f(x)$在$(0,+\\infty )$单调增; $0