From 3507aeffdb02eff079d7d605dfed9f2459bb277e Mon Sep 17 00:00:00 2001 From: WangWeiye Date: Thu, 6 Apr 2023 19:05:35 +0800 Subject: [PATCH] 20230406 evening --- 工具/修改题目数据库.py | 2 +- 工具/文本文件/metadata.txt | 238 +------------------------ 工具/添加关联题目.py | 4 +- 工具/讲义生成.py | 7 +- 题库0.3/Problems.json | 352 +++++++++++++++++++++++++++++++++---- 5 files changed, 327 insertions(+), 276 deletions(-) diff --git a/工具/修改题目数据库.py b/工具/修改题目数据库.py index 569bc8ad..11629a5f 100644 --- a/工具/修改题目数据库.py +++ b/工具/修改题目数据库.py @@ -1,6 +1,6 @@ import os,re,json """这里编辑题号(列表)后将在vscode中打开窗口, 编辑后保存关闭, 随后运行第二个代码块""" -problems = "10000,10003" +problems = "40070" def generate_number_set(string,dict): string = re.sub(r"[\n\s]","",string) diff --git a/工具/文本文件/metadata.txt b/工具/文本文件/metadata.txt index d572ede5..ef3b7bec 100644 --- a/工具/文本文件/metadata.txt +++ b/工具/文本文件/metadata.txt @@ -1,235 +1,3 @@ -usages -001050 -20220906 2023届高三2班 0.871 - -009446 -20220906 2023届高三2班 0.355 - -001072 -20220906 2023届高三2班 0.774 - -010060 -20220906 2023届高三2班 0.742 - -000033 -20220906 2023届高三2班 0.903 - -001073 -20220906 2023届高三2班 0.935 - -000023 -20220906 2023届高三2班 0.774 - -002773 -20220906 2023届高三2班 0.742 - -002775 -20220906 2023届高三2班 0.645 - -002784 -20220906 2023届高三2班 0.903 - -007991 -20220906 2023届高三2班 0.581 - -005150 -20220906 2023届高三2班 0.903 - -002790 -20220906 2023届高三2班 0.774 - -002791 -20220906 2023届高三2班 0.774 - -000757 -20220906 2023届高三2班 0.968 - -002793 -20220906 2023届高三2班 0.968 - -000389 -20220906 2023届高三2班 0.871 - -002800 -20220906 2023届高三2班 0.903 - -000778 -20220907 2023届高三2班 0.750 - -001262 -20220907 2023届高三2班 0.656 - -000342 -20220907 2023届高三2班 0.125 - -001238 -20220907 2023届高三2班 0.906 - -001239 -20220907 2023届高三2班 0.875 - -001242 -20220907 2023届高三2班 0.844 - -002831 -20220907 2023届高三2班 0.594 0.406 - -002968 -20220907 2023届高三2班 0.531 0.063 - -009508 -20220907 2023届高三2班 1.000 - -003936 -20220907 2023届高三2班 0.906 - -007984 -20220907 2023届高三2班 1.000 - -009511 -20220907 2023届高三2班 0.844 - -005508 -20220907 2023届高三2班 0.844 - -000734 -20220907 2023届高三2班 0.469 - -002856 -20220907 2023届高三2班 0.781 0.906 - -000474 -20220907 2023届高三2班 0.813 - -002847 -20220907 2023届高三2班 0.844 0.938 - -002851 -20220907 2023届高三2班 0.500 0.281 - -001286 -20220907 2023届高三2班 0.906 - -001292 -20220907 2023届高三2班 0.906 - -010110 -20220907 2023届高三2班 1.000 1.000 0.875 0.906 - -000058 -20220907 2023届高三2班 1.000 - -010114 -20220907 2023届高三2班 0.844 - -001296 -20220907 2023届高三2班 1.000 - -005610 -20220907 2023届高三2班 0.906 - -001353 -20220907 2023届高三2班 0.813 - -001305 -20220907 2023届高三2班 0.813 0.813 0.969 0.969 0.969 - -010125 -20220907 2023届高三2班 0.969 - -001309 -20220907 2023届高三2班 1.000 0.750 - -005123 -20220907 2023届高三2班 0.563 - -005678 -20220907 2023届高三2班 0.469 - -001340 -20220908 2023届高三2班 0.788 0.818 0.879 0.727 0.788 - -002925 -20220908 2023届高三2班 0.939 - -002911 -20220908 2023届高三2班 0.879 - -002918 -20220908 2023届高三2班 0.727 - -003815 -20220908 2023届高三2班 0.939 - -005568 -20220908 2023届高三2班 0.939 - -000954 -20220908 2023届高三2班 1.000 - -001324 -20220908 2023届高三2班 0.879 - -001326 -20220908 2023届高三2班 0.939 0.970 - -002871 -20220908 2023届高三2班 0.818 - -002878 -20220908 2023届高三2班 0.818 0.818 - -002898 -20220908 2023届高三2班 0.727 - -000362 -20220908 2023届高三2班 0.879 - -001351 -20220908 2023届高三2班 0.848 - -003747 -20220908 2023届高三2班 0.727 - -005199 -20220908 2023届高三2班 0.970 - -009490 -20220908 2023届高三2班 0.879 - -009517 -20220909 2023届高三2班 0.656 - -007941 -20220909 2023届高三2班 0.813 - -000092 -20220909 2023届高三2班 0.625 - -001270 -20220909 2023届高三2班 1.000 1.000 0.969 0.781 - -002888 -20220909 2023届高三2班 0.719 - -001331 -20220909 2023届高三2班 0.156 - -002894 -20220909 2023届高三2班 0.844 0.750 - -001211 -20220909 2023届高三2班 0.969 0.906 0.875 0.844 0.750 - -001218 -20220909 2023届高三2班 0.906 0.750 0.625 - -002893 -20220909 2023届高三2班 0.813 - -002895 -20220909 2023届高三2班 0.688 - -009522 -20220909 2023届高三2班 0.563 0.250 - +remark +14804 +(3) 中证明不可能小于$51$的核心是$max(a_{2n-1},a_{2n})$是严格增数列 \ No newline at end of file diff --git a/工具/添加关联题目.py b/工具/添加关联题目.py index 24c3bcba..84f39a26 100644 --- a/工具/添加关联题目.py +++ b/工具/添加关联题目.py @@ -1,8 +1,8 @@ import os,re,json,time """---设置原题目id与新题目id列表, 新id的数目不能小于旧id的数目---""" -old_ids = "601" -new_ids = "50000" +old_ids = "12213,248,31233,282,8912,9784" +new_ids = "31386:40000" """---设置完毕---""" """---完成编辑后记得运行第二个单元格---""" diff --git a/工具/讲义生成.py b/工具/讲义生成.py index dd339d42..3a059f8f 100644 --- a/工具/讲义生成.py +++ b/工具/讲义生成.py @@ -5,12 +5,13 @@ import os,re,json,time,sys """2: 测验卷与周末卷(填空题, 选择题, 解答题)""" """3: 日常选题讲义(一个section)""" -paper_type = 2 # 随后设置一下后续的讲义标题 +paper_type = 1 # 随后设置一下后续的讲义标题 """---设置题块编号---""" problems = [ -"14784:14795","14796:14799","14800:14804" +"000363,000625,002372,003421,010951,31386,012255,013097,013118,031323,31387,008866,012199,012548,013134","000960,002162,013063,002418,013982,014505,031229,031388,010958,31389,31390,31391,002268" + ] """---设置结束---""" @@ -19,7 +20,7 @@ problems = [ if paper_type == 1: enumi_mode = 0 #设置模式(1为整卷统一编号, 0为每一部分从1开始编号) template_file = "模板文件/复习讲义模板.txt" #设置模板文件名 - exec_list = [("标题数字待处理","06"),("标题文字待处理","概率与统计")] #设置讲义标题 + exec_list = [("标题数字待处理","04"),("标题文字待处理","易错题-解析几何")] #设置讲义标题 destination_file = "临时文件/"+exec_list[0][1]+"_"+exec_list[1][1] # 设置输出文件名 elif paper_type == 2: enumi_mode = 1 #设置模式(1为整卷统一编号, 0为每一部分从1开始编号) diff --git a/题库0.3/Problems.json b/题库0.3/Problems.json index 4e68e3b8..f5cee484 100644 --- a/题库0.3/Problems.json +++ b/题库0.3/Problems.json @@ -6547,7 +6547,9 @@ "20220624\t王伟叶, 余利成" ], "same": [], - "related": [], + "related": [ + "031387" + ], "remark": "", "space": "12ex" }, @@ -7481,7 +7483,8 @@ ], "related": [ "010685", - "008930" + "008930", + "031389" ], "remark": "", "space": "12ex" @@ -87922,7 +87925,9 @@ "20220701\t王伟叶" ], "same": [], - "related": [], + "related": [ + "031385" + ], "remark": "", "space": "12ex" }, @@ -176152,7 +176157,7 @@ }, "006793": { "id": "006793", - "content": "已知数列$\\{a_n\\}$的前$n$项和$S_n=4-4\\times 2^{-n}$($n\\in \\mathbf{N}^*$), 求证: $\\{a_n\\}$成等比数列.", + "content": "已知数列$\\{a_n\\}$的前$n$项和$S_n=4-4\\times 2^{-n}$($n\\in \\mathbf{N}$, $n \\ge 1$), 求证: $\\{a_n\\}$成等比数列.", "objs": [ "K0403003X" ], @@ -226144,7 +226149,9 @@ "20220726\t王伟叶" ], "same": [], - "related": [], + "related": [ + "031390" + ], "remark": "", "space": "12ex" }, @@ -246256,7 +246263,9 @@ "20220730\t王伟叶" ], "same": [], - "related": [], + "related": [ + "031391" + ], "remark": "", "space": "12ex" }, @@ -270115,7 +270124,9 @@ "20220806\t王伟叶" ], "same": [], - "related": [], + "related": [ + "031384" + ], "remark": "", "space": "12ex" }, @@ -304552,7 +304563,9 @@ "20221209\t王伟叶" ], "same": [], - "related": [], + "related": [ + "031386" + ], "remark": "", "space": "" }, @@ -321908,7 +321921,9 @@ "20230118\t王伟叶" ], "same": [], - "related": [], + "related": [ + "031382" + ], "remark": "", "space": "" }, @@ -322992,7 +323007,9 @@ "20230118\t王伟叶" ], "same": [], - "related": [], + "related": [ + "031383" + ], "remark": "", "space": "" }, @@ -364746,7 +364763,7 @@ "objs": [], "tags": [], "genre": "填空题", - "ans": "", + "ans": "$\\{3\\}$", "solution": "", "duration": -1, "usages": [], @@ -364765,7 +364782,7 @@ "objs": [], "tags": [], "genre": "填空题", - "ans": "", + "ans": "$\\dfrac{24}{25}$", "solution": "", "duration": -1, "usages": [], @@ -364784,7 +364801,7 @@ "objs": [], "tags": [], "genre": "填空题", - "ans": "", + "ans": "$-n+10$", "solution": "", "duration": -1, "usages": [], @@ -364803,7 +364820,7 @@ "objs": [], "tags": [], "genre": "填空题", - "ans": "", + "ans": "$80$", "solution": "", "duration": -1, "usages": [], @@ -364822,7 +364839,7 @@ "objs": [], "tags": [], "genre": "填空题", - "ans": "", + "ans": "$\\dfrac{3}{3x-2}$($x<\\dfrac 23$)", "solution": "", "duration": -1, "usages": [], @@ -364841,7 +364858,7 @@ "objs": [], "tags": [], "genre": "填空题", - "ans": "", + "ans": "$12\\pi$", "solution": "", "duration": -1, "usages": [], @@ -364860,7 +364877,7 @@ "objs": [], "tags": [], "genre": "填空题", - "ans": "", + "ans": "$(0,1]$", "solution": "", "duration": -1, "usages": [], @@ -364879,7 +364896,7 @@ "objs": [], "tags": [], "genre": "填空题", - "ans": "", + "ans": "$107$", "solution": "", "duration": -1, "usages": [], @@ -364898,7 +364915,7 @@ "objs": [], "tags": [], "genre": "填空题", - "ans": "", + "ans": "$\\dfrac{\\pi}4$", "solution": "", "duration": -1, "usages": [], @@ -364917,7 +364934,7 @@ "objs": [], "tags": [], "genre": "填空题", - "ans": "", + "ans": "$\\sqrt{7}$", "solution": "", "duration": -1, "usages": [], @@ -364936,7 +364953,7 @@ "objs": [], "tags": [], "genre": "填空题", - "ans": "", + "ans": "$[\\dfrac 13,\\dfrac 53)$", "solution": "", "duration": -1, "usages": [], @@ -364955,7 +364972,7 @@ "objs": [], "tags": [], "genre": "填空题", - "ans": "", + "ans": "$\\sqrt{5}$", "solution": "", "duration": -1, "usages": [], @@ -364974,7 +364991,7 @@ "objs": [], "tags": [], "genre": "选择题", - "ans": "", + "ans": "C", "solution": "", "duration": -1, "usages": [], @@ -364993,7 +365010,7 @@ "objs": [], "tags": [], "genre": "选择题", - "ans": "", + "ans": "D", "solution": "", "duration": -1, "usages": [], @@ -365012,7 +365029,7 @@ "objs": [], "tags": [], "genre": "选择题", - "ans": "", + "ans": "A", "solution": "", "duration": -1, "usages": [], @@ -365031,7 +365048,7 @@ "objs": [], "tags": [], "genre": "选择题", - "ans": "", + "ans": "B", "solution": "", "duration": -1, "usages": [], @@ -365050,7 +365067,7 @@ "objs": [], "tags": [], "genre": "解答题", - "ans": "", + "ans": "(1) $a=0.1$, $b=0.3$; (2) $P(B)=0.5$, $P(A\\cap B)=0.3$, $P(A)P(B)=0.25\\ne 0.3$, 不相互独立", "solution": "", "duration": -1, "usages": [], @@ -365069,7 +365086,7 @@ "objs": [], "tags": [], "genre": "解答题", - "ans": "", + "ans": "(1) $\\dfrac{\\sqrt{3}}3$; (2) $\\dfrac\\pi 6$", "solution": "", "duration": -1, "usages": [], @@ -365088,7 +365105,7 @@ "objs": [], "tags": [], "genre": "解答题", - "ans": "", + "ans": "(1) 约$5.6$千米($\\sqrt{31.25}$); (2) 约$6.2$平方千米($\\dfrac{32\\sqrt{3}}{9}$)", "solution": "", "duration": -1, "usages": [], @@ -365107,7 +365124,7 @@ "objs": [], "tags": [], "genre": "解答题", - "ans": "", + "ans": "(1) $a=8$; (2) $a=2$; (3) $[\\dfrac{4\\sqrt{7}-8}3,4)\\cup (4,+\\infty)$", "solution": "", "duration": -1, "usages": [], @@ -365126,7 +365143,7 @@ "objs": [], "tags": [], "genre": "解答题", - "ans": "", + "ans": "(1) $3,7,10,17$或$3,7,10,3$或$3,7,4,11$; (2) 不存在, 证明略; (3) $51$, 证明略", "solution": "", "duration": -1, "usages": [], @@ -365136,7 +365153,7 @@ ], "same": [], "related": [], - "remark": "", + "remark": "(3) 中证明不可能小于$51$的核心是$max(a_{2n-1},a_{2n})$是严格增数列", "space": "12ex" }, "020001": { @@ -416374,7 +416391,7 @@ }, "030072": { "id": "030072", - "content": "若数列$\\{a_n\\}$的所有项都是正数, 且$\\sqrt{a_1}+\\sqrt{a_2}+\\cdots +\\sqrt{a_n}=n^2+3n$($n\\in \\mathbf{N}^*$), 则$\\dfrac{a_1}{2}+\\dfrac{a_2}{3}+\\cdots +\\dfrac{a_n}{n+1}=$\\blank{50}.", + "content": "若数列$\\{a_n\\}$的所有项都是正数, 且$\\sqrt{a_1}+\\sqrt{a_2}+\\cdots +\\sqrt{a_n}=n^2+3n$($n\\in \\mathbf{N}$, $n \\ge 1$), 则$\\dfrac{a_1}{2}+\\dfrac{a_2}{3}+\\cdots +\\dfrac{a_n}{n+1}=$\\blank{50}.", "objs": [ "K0402005X", "K0402004X" @@ -444769,7 +444786,8 @@ ], "same": [], "related": [ - "014003" + "014003", + "031388" ], "remark": "", "space": "" @@ -448770,6 +448788,270 @@ "remark": "", "space": "12ex" }, + "031382": { + "id": "031382", + "content": "已知数列$\\{a_n\\}$满足$a_{n+2}-a_n=2^n$, $a_1=1$, $a_2=2$, 则$a_n=$\\blank{50}.", + "objs": [], + "tags": [ + "第四单元" + ], + "genre": "填空题", + "ans": "", + "solution": "", + "duration": -1, + "usages": [], + "origin": "2022届高三第二轮复习讲义-20230406修改", + "edit": [ + "20230118\t王伟叶", + "20230406\t刘亚东" + ], + "same": [], + "related": [ + "012933" + ], + "remark": "", + "space": "" + }, + "031383": { + "id": "031383", + "content": "设等差数列$\\{a_n\\}$的前$n$项和为$S_n$, 若$S_4 \\geq 10$, $S_5 \\leq 15$, 则$a_5$的最大值为\\blank{50}.", + "objs": [], + "tags": [ + "第四单元" + ], + "genre": "填空题", + "ans": "", + "solution": "", + "duration": -1, + "usages": [], + "origin": "2022届高三第二轮复习讲义-20230406修改", + "edit": [ + "20230118\t王伟叶", + "20230406\t刘亚东" + ], + "same": [], + "related": [ + "012979" + ], + "remark": "", + "space": "" + }, + "031384": { + "id": "031384", + "content": "已知数列$\\{a_n\\}$的通项公式为$a_n=\\dfrac{n-\\sqrt {98}}{n-\\sqrt {97}}$, 试问: 该数列是否有最大项、最小项? 若有, 分别指出第几项最大、最小; 若没有, 试说明理由.", + "objs": [ + "K0406002X", + "K0406005X" + ], + "tags": [ + "第四单元" + ], + "genre": "解答题", + "ans": "", + "solution": "", + "duration": -1, + "usages": [], + "origin": "新教材选择性必修第一册习题-20230406修改", + "edit": [ + "20220806\t王伟叶", + "20230406\t刘亚东" + ], + "same": [], + "related": [ + "010777" + ], + "remark": "", + "space": "12ex" + }, + "031385": { + "id": "031385", + "content": "已知数列$\\{a_n\\}$的通项$a_n=(n-2)(\\dfrac{10}{11})^n$, 试问该数列有没有最大项与最小项? 若有, 求出最大项与最小项; 若没有, 说明理由.", + "objs": [ + "K0406005X" + ], + "tags": [ + "第四单元" + ], + "genre": "解答题", + "ans": "", + "solution": "", + "duration": -1, + "usages": [], + "origin": "2022届高三第一轮复习讲义-20230406修改", + "edit": [ + "20220701\t王伟叶", + "20230406\t余利成" + ], + "same": [], + "related": [ + "003210" + ], + "remark": "", + "space": "12ex" + }, + "031386": { + "id": "031386", + "content": "已知$P$为椭圆$\\dfrac{x^2}4+\\dfrac{y^2}2=1$上的任意一点, $Q$与$P$关于$x$轴对称, $F_1$、$F_2$为椭圆的左、右焦点, 若有$\\overrightarrow{F_1 P} \\cdot \\overrightarrow{F_2P} \\leq 1$, 求向量$\\overrightarrow{F_1 P}$与$\\overrightarrow{F_2 Q}$夹角的取值范围.", + "objs": [], + "tags": [ + "第七单元" + ], + "genre": "解答题", + "ans": "$[\\pi-\\arccos\\dfrac 13,\\pi]$", + "solution": "", + "duration": -1, + "usages": [], + "origin": "2019届春季高考试题11-20230406修改", + "edit": [ + "20221209\t王伟叶", + "20230406\t周双" + ], + "same": [], + "related": [ + "012213" + ], + "remark": "因过程较长, 从12213改为解答题, 内容不变", + "space": "12ex" + }, + "031387": { + "id": "031387", + "content": "过点$(3, -2)$, 且在$x$轴、$y$轴上截距相等的直线的方程为\\blank{50}.", + "objs": [ + "K0702001X", + "K0702002X" + ], + "tags": [ + "第七单元", + "直线" + ], + "genre": "填空题", + "ans": "$y=-\\dfrac 23 x$或$y=-x+1$", + "solution": "", + "duration": -1, + "usages": [], + "origin": "教材复习题-20230406修改", + "edit": [ + "20220624\t王伟叶, 余利成", + "20230406\t周双" + ], + "same": [], + "related": [ + "000248" + ], + "remark": "因答案能明显地反映出思考过程, 故从248改为填空题, 内容不变", + "space": "" + }, + "031388": { + "id": "031388", + "content": "设抛物线$C: y^2=4 x$的焦点为$F$, 过$F$且斜率为$k(k>0)$的直线$l$与$C$交于$A$、$B$两点, $|AB|=8$. 求直线$l$的方程为及过点$A, B$且与抛物线$C$的准线相切的圆的方程.", + "objs": [], + "tags": [ + "第七单元" + ], + "genre": "解答题", + "ans": "$y=x-1$; $(x-3)^2+(y-2)^2=16$或$(x-11)^2+(y+6)^2=144$", + "solution": "", + "duration": -1, + "usages": [], + "origin": "2020年空中课堂高三复习课22-20230214修改-20230406修改", + "edit": [ + "20230128\t王伟叶", + "20230214\t吴惠群", + "20230406\t周双" + ], + "same": [], + "related": [ + "014003", + "031233" + ], + "remark": "因过程较长, 从31233改为解答题, 内容不变", + "space": "24ex" + }, + "031389": { + "id": "031389", + "content": "已知直线$y=ax-1$与曲线$y^2=2x$只有一个公共点, 则实数$a$的值为\\blank{50}.", + "objs": [ + "K0720003X" + ], + "tags": [ + "第七单元" + ], + "genre": "填空题", + "ans": "$a=0$或$-\\dfrac 12$", + "solution": "", + "duration": -1, + "usages": [], + "origin": "教材复习题-20230406修改", + "edit": [ + "20220624\t王伟叶, 余利成", + "20230406\t周双" + ], + "same": [], + "related": [ + "010685", + "008930", + "000282" + ], + "remark": "因答案能明显地反映出思考过程, 故从282改为填空题, 内容不变", + "space": "" + }, + "031390": { + "id": "031390", + "content": "已知双曲线的虚轴的长为$6$, 一条渐近线的方程为$3x-y=0$, 则此双曲线的标准方程为\\blank{50}.", + "objs": [ + "K0717006X", + "K0716003X" + ], + "tags": [ + "第七单元", + "双曲线" + ], + "genre": "填空题", + "ans": "$x^2-\\dfrac{y^2}9=1$或$\\dfrac{y^2}{81}-\\dfrac{x^2}9=1$", + "solution": "", + "duration": -1, + "usages": [], + "origin": "二期课改练习册高二第二学期-20230406修改", + "edit": [ + "20220726\t王伟叶", + "20230406\t周双" + ], + "same": [], + "related": [ + "008912" + ], + "remark": "因过程不易书写, 意义不大, 故从8912改为填空题, 内容不变", + "space": "" + }, + "031391": { + "id": "031391", + "content": "倾斜角是$\\dfrac{5\\pi} 6$, 且在$x$轴上的截距为$-1$的直线$l$的点斜式方程为\\blank{50}.", + "objs": [ + "K0702001X", + "K0702004X", + "K0701002X" + ], + "tags": [ + "第七单元", + "直线" + ], + "genre": "填空题", + "ans": "$y=-\\dfrac{\\sqrt 3}{3}(x+1)$", + "solution": "", + "duration": -1, + "usages": [], + "origin": "新教材选择性必修第一册课堂练习-20230406修改", + "edit": [ + "20220730\t王伟叶", + "20230406\t周双" + ], + "same": [], + "related": [ + "009784" + ], + "remark": "因题目简单, 故从9784改为填空题, 内容不变", + "space": "" + }, "040001": { "id": "040001", "content": "参数方程$\\begin{cases}x=3 t^2+4, \\\\ y=t^2-2\\end{cases}$($0 \\leq t \\leq 3$)所表示的曲线是\\bracket{20}.\n\\fourch{一支双曲线}{线段}{圆弧}{射线}", @@ -450227,7 +450509,7 @@ }, "040070": { "id": "040070", - "content": "按要求填写象限:\\\\\n(1) 若$\\alpha$在第二象限, 则$\\dfrac{\\alpha}{3}$总不在第象限(填写``一''、``二''、``三''、``四''之一);\\\\\n(2) 若$-\\dfrac{\\pi}{2}<\\alpha<0$, 则点$(\\sin \\alpha, \\cot \\alpha)$总在第象限(填写``一''、``二''、``三''、``四''之一).", + "content": "按要求填写象限:\\\\\n(1) 若$\\alpha$在第二象限, 则$\\dfrac{\\alpha}{3}$总不在第\\blank{50}象限(填写``一''、``二''、``三''、``四''之一);\\\\\n(2) 若$-\\dfrac{\\pi}{2}<\\alpha<0$, 则点$(\\sin \\alpha, \\cot \\alpha)$总在第\\blank{50}象限(填写``一''、``二''、``三''、``四''之一).", "objs": [], "tags": [], "genre": "解答题",