基数词（教师讲解卷）-2026版四川省（对口招生）《英语考点双析卷》第15卷（原卷版+解析版）

编写说明：2026版四川省（对口招生）《英语考点双析卷》，依据最新版《中等职业学校英语课程标准》及历年对口高考真题进行编写。“考点双析”即围绕一个考点，一份是老师的讲解卷，一份是学生的练习卷，共涵盖51个考点的102份试卷，助力师生构建 “讲练结合” 的学习闭环，特别适用于第一轮高考复习。 本卷是2026版四川省（对口招生）《英语考点双析卷》的第15卷，主要考查基数词。 2026版四川省（对口招生）《英语考点双析卷》第15卷 基数词 教师讲解卷 一、单项选择（共40小题；每小题2.5分，满分 100分） 从每题所给的A、B、C和D四个选项中，选出最佳选项。 1．There are _______students in our school.​ A．eight hundred and sixty B．eight hundreds and sixty C．eight hundred sixty D．eight hundreds sixty​ 2．On Tree Planting Day, the students in our school planted five ________ trees on the hill. A．hundreds B．hundred of C．hundreds of D．hundred 3．We gave away ________ clothes to the village last year. A．six thousands B．six thousand C．six thousands of D．six thousand of 4．After the Asian Games, _______people came to Guangzhou for a visit during holidays. A．thousand B．thousands C．thousand of D．thousands of 5．It’s never too old to learn. Karl Marx began to learn English in his ________. A．the fiftieth B．fiftieth C．fifty D．fifties 6．In this test , we’re asked to write a passage of about ________. A．80-words B．80-word C．80 words D．80 words’ 7．— How many people were invited to the meeting? — About six_______. A．hundred B．hundreds C．hundred of D．hundreds of 8．________ students took the college entrance exam on time ________ the morning of June 7th in South China, though it rained heavily. A．Thousands of; in B．Many thousands; on C．Thousands of; on D．Thousand of; in 9．— ________ of volunteers will be needed for 2014 International Horticulture Exposition in Qingdao. — Let’s go and ________ them. A．Thousands; join B．Thousand; be a member of C．Three thousand; take part in D．Thousands; be in 10．The chairperson received about three ________ applications to join the Bird watching Club. A．hundred B．hundreds of C．hundred of D．hundreds 11．— Guang’an is a beautiful city, isn’t it? — Yes. There are about two ________ visitors here every week. A．thousands of B．thousands C．thousand D．thousand of 12．________ visitors come to Xingyi during May Day holidays every year. A．Thousands of B．Two thousands C．Thousand of D．Thousand 13．Mr Smith stayed in ________ last night. A．Room 403 B．the Room 403 C．the 403 room D．403 the room 14．After trying ________ times, he finally succeeded in passing the driving test. A．the third B．three C．a third D．third 15．The practice demonstration will be held in Teaching Building ________. A．Two B．Second C．Twice D．First 16．There are ________ days in February this year, because it’s not a leap year. A．twenty-eight B．twenty-nine C．thirty D．thirty-one 17．The singer and actor is very popular on Douyin. _________ people follow him to work out at home. A．Million B．Millions C．Million of D．Millions of 18．This expensive smartphone costs nearly ________ dollars in the American market. A．eight hundred and eighty-eight B．eight hundred eighty eight C．eight hundred eighty-eight D．eight hundreds and eighty-eight 19．Wu Dajiang, a ________ Chinese skater, set a new world record at the Short Track World Cup last year. A．25-year-old B．25-years-old C．25 years old D．25year old 20．In our school, ________ students went to Beijing in 2008 and watched the Olympic Games. A．thousand of B．thousands of C．two thousands of D．two thousand of 21．The computer was cheap. I spent only two ________ yuan on it. A．thousands B．thousand C．thousands of D．thousand of 22．She went to the bookstore and bought ________. A．dozen books B．dozens books C．dozen of books D．dozens of books 23．________ students will take part in the school sports meeting. A．Four hundreds B．Four hundred C．Four hundreds of D．Four hundred of 24．There is a _________bridge over the river. A．600 meters B．600-meter C．600 meter D．600-meters 25．I saw a snake ________ on the hill yesterday. A．5-meters-long B．5-meter-long C．5 meters long D．5 meter long 26．Steve is ________ and he has a ________ sister. A．13-year-old; 10 years old B．13 years old; 10-year-old C．13 years old; 10-years-old D．13-years-old; 10-years-old 27．Please turn to Page ________ and take a look at the picture. A．the eightieth B．Eightieth C．Eighties D．Eighty 28．— How long will you stay here? — ________. A．Two and half week B．Two and a half week C．Two weeks and a half D．A half and two weeks 29．The actor entered the film industry in ________ when he was in ________. A．the 1970s; twentieth B．1970; the twenties C．the 1970s; his twenties D．1970s; his twenties 30．It took me ________ to finish my homework. A．a half and two hour B．two hour and a half C．two and a half hour D．two and a half hours 31．It was in ________ when she was in ________ that she went to Shanghai. A．the 1980s; the twenties B．the 1980s; her twenties C．1980’s; her twenties D．1980’s; the her twenties 32．Karl Marx, was born in Germany ________ ago. A．the two hundredth year B．two hundred-year C．two hundred years D．two hundreds years 33．— Your grandpa looks just in his ________. — Ha-ha. He is going to celebrate his 80th birthday soon. A．sixty B．sixties C．sixtieth D．the sixties 34．She is ________, but she looks young. A．in her fifties B．at her fifty C．in her fifty D．at her fifties 35．When the accident happened, I was only __________. A．six-year-old B．six-years-old C．six years old D．six year old 36．Several ________ died of water pollution last winter. A．hundreds villagers B．hundred of villagers C．hundreds of villager D．hundred villagers 37．I have lost my watch and I have to buy ________. A．one B．ones C．it D．that 38．Do you want to buy ________ pork? A．half kilo B．half a kilo C．a kilo half D．a half kilo 39．Tom became a soldier in ________. He was in ________ at that time. A．1990’s; twenties B．the 1990’s; his twenties C．the 1990’s; the twenties D．1990’s; the twenties 40．On ________, there will be ________ people in the church, taking part in the celebration. A．October three; thousand B．October third; thousands C．October 3rd; thousands of D．October the third; thousand of 试卷第1页，共3页 原创精品资源学科网独家享有版权，侵权必究！ 学科网（北京）股份有限公司 $ 编写说明：2026版四川省（对口招生）《英语考点双析卷》，依据最新版《中等职业学校英语课程标准》及历年对口高考真题进行编写。“考点双析”即围绕一个考点，一份是老师的讲解卷，一份是学生的练习卷，共涵盖51个考点的102份试卷，助力师生构建 “讲练结合” 的学习闭环，特别适用于第一轮高考复习。 本卷是2026版四川省（对口招生）《英语考点双析卷》的第15卷，主要考查基数词。 2026版四川省（对口招生）《英语考点双析卷》第15卷 基数词 教师讲解卷 一、单项选择（共40小题；每小题2.5分，满分 100分） 从每题所给的A、B、C和D四个选项中，选出最佳选项。 1．There are _______students in our school.​ A．eight hundred and sixty B．eight hundreds and sixty C．eight hundred sixty D．eight hundreds sixty​ 【答案】A 【详解】考查基数词。句意：在我们学校有八百六十个学生。分析句子和选项可知，此处表达八百六十即“八个百加六十”，在英语表达中，hundred表示确数时是“基数词+hundred”，百位与十位/个位之间加and连接，因此八百六十表示为eight hundred and sixty。故选A。 2．On Tree Planting Day, the students in our school planted five ________ trees on the hill. A．hundreds B．hundred of C．hundreds of D．hundred 【答案】D 【详解】考查数词。句意：在植树节，我们学校的学生在山上种了五百棵树。hundred前有具体数字时，用原形，且不加of；hundreds of表示“数以百计的”，前面不能有具体数字。此处有five，所以用hundred。故选D。 3．We gave away ________ clothes to the village last year. A．six thousands B．six thousand C．six thousands of D．six thousand of 【答案】B 【详解】考查数词。句意：去年我们向那个村庄捐赠了六千件衣物。thousand 前有具体数字时，用单数形式，且不与of连用；thousands of表示“成千上万的”，前面不能有具体数字。结合选项可知，six thousand意为“六千”，表达正确。故选B。 4．After the Asian Games, _______people came to Guangzhou for a visit during holidays. A．thousand B．thousands C．thousand of D．thousands of 【答案】D 【详解】考查基数词。句意：在亚运会之后，数千人在假期来到杭州参观。空后名词“people”是复数概念，选项所给词thousand表示确数时，用基数词+thousand，表示约数时，使用thousands of。故选D。 5．It’s never too old to learn. Karl Marx began to learn English in his ________. A．the fiftieth B．fiftieth C．fifty D．fifties 【答案】D 【详解】考查数词。句意：活到老，学到老。卡尔・马克思在他五十多岁时开始学英语。“in one’s + 整十数的复数形式”表示“在某人……多岁时”，fifties是fifty的复数形式。故选D。 6．In this test , we’re asked to write a passage of about ________. A．80-words B．80-word C．80 words D．80 words’ 【答案】C 【详解】考查名词短语。句意：在这次测试中，我们被要求写一篇大约80词的短文。“80 words”意为“80个词”，名词短语；“80-word”是复合形容词，通常用来作定语修饰名词。空后没有名词，所以名词短语作介词about的宾语。故选C。 7．— How many people were invited to the meeting? — About six_______. A． hundred B．hundreds C．hundred of D．hundreds of 【答案】A 【详解】考查基数词。句意：——多少人被邀请来这次会议？——大约六百人。根据空前“six”可知，此处表示具体数量，表示具体几百时，hundred使用单数形式，不加介词。故选A。 8．________ students took the college entrance exam on time ________ the morning of June 7th in South China, though it rained heavily. A．Thousands of; in B．Many thousands; on C．Thousands of; on D．Thousand of; in 【答案】C 【详解】考查数词及介词辨析。句意：尽管中国南方在6月7日早上雨下得很大，但是成千上万的学生按时参加了高考。“thousands of”是固定短语，表示“成千上万的”，用于修饰可数名词复数，所以第一个空填Thousands of；“在具体某一天的早上、下午或晚上”要用介词“on”，所以第二个空填“on”。故选C。 9．— ________ of volunteers will be needed for 2014 International Horticulture Exposition in Qingdao. — Let’s go and ________ them. A．Thousands; join B．Thousand; be a member of C．Three thousand; take part in D．Thousands; be in 【答案】A 【详解】考查基数词和动词（短语）辨析。句意：——2014年青岛国际园艺博览会将需要数千名志愿者。——我们去加入他们吧。join加入，join sb.表示“加入某人”；be a member of成为……的一员，后接组织、机构或团体；take part in参加，后接群众性活动，会议，劳动，游行等；be in在……里面，后接名词，表示状态、位置或穿着。第一空，如果thousand前面有具体的数字，后面不能有of，则thousand用单数；如果前面没有具体的数字，后面有of，则thousand用复数thousands，本空前面没有具体的数字，且空后有of，因此要用thousands；第二空，空后them是代词，故用join构成“join sb.”，表示加入到志愿者的队伍中。故选A。 10．The chairperson received about three ________ applications to join the Bird watching Club. A．hundred B．hundreds of C．hundred of D．hundreds 【答案】A 【详解】考查基数词。句意：主席收到了大约三百份加入观鸟俱乐部的申请。如果hundred前面有具体的数字，hundred要用单数；如果前面没有具体的数字，就用hundreds of，本题设空处前有具体的数字three，因此要用hundred。故选A。 11．— Guang’an is a beautiful city, isn’t it? — Yes. There are about two ________ visitors here every week. A． thousands of B．thousands C．thousand D．thousand of 【答案】C 【详解】考查数词。句意：——广安是一个美丽的城市，不是吗？——是的。每周大约有两千名游客来这里。A. thousands of成千上万的；B. thousands千（复数形式，不单独使用）；C. thousand千（单数形式，与具体数字连用时不用复数形式）；D. thousand of（形式错误）。根据“two”可知，此处表示具体数量，应用thousand。故选C。 12．________ visitors come to Xingyi during May Day holidays every year. A．Thousands of B．Two thousands C．Thousand of D．Thousand 【答案】A 【详解】考查基数词。句意：每年五一期间，成千上万的游客来到兴义。如果thousand前面有具体的数字，thousand要用单数；如果前面没有具体的数字，就用thousands of，本题设空处前面没有具体的数字，因此要用thousands of。故选A。 13．Mr Smith stayed in ________ last night. A．Room 403 B．the Room 403 C．the 403 room D．403 the room 【答案】A 【详解】考查基数词。句意：史密斯先生昨晚住在 403 号房间。在英语中，用基数词表达时间编号为“名词（首字母大写）+基数词”，无需加定冠词the 。故选A。 14．After trying ________ times, he finally succeeded in passing the driving test. A． the third B．three C．a third D．third 【答案】B 【详解】考查数词。句意：尝试了三次后，他终于成功通过了驾照考试。A. the third第三，强调顺序，后接可数名词单数；B. three三，基数词，修饰复数名词；C. a third又一次、再一次，后接单数名词 ；D. third第三，序数词，单独使用不能修饰名词。根据空后“times”是复数形式（次数）可知，此处应用基数词three，表示“三次”，符合语境。故选B。 15．The practice demonstration will be held in Teaching Building ________. A．Two B．Second C．Twice D．First 【答案】A 【详解】考查基数词。句意：实践演示将在教学楼二栋举行。A. Two二；B. Second第二；C. Twice两次；D. First第一。此处是表“教学楼二栋”，英语中，建筑物编号可用序数词来表达（即： the Second Building）或“名词+基数词（首字母都要大写）”（即：Teaching Building Two）。故选A。 16．There are ________ days in February this year, because it’s not a leap year. A．twenty-eight B．twenty-nine C．thirty D．thirty-one 【答案】A 【详解】考查数词。句意：今年二月有28天，因为今年不是闰年。A. twenty-eight二十八；B. twenty-nine二十九；C. thirty三十；D. thirty-one三十一。根据非闰年的二月有28天可知，A符合语境。故选A。 17．The singer and actor is very popular on Douyin. _________ people follow him to work out at home. A．Million B．Millions C．Million of D．Millions of 【答案】D 【详解】考查数词。句意：这位歌手兼演员在抖音上很受欢迎。数以百万计的人跟随他在家锻炼。million前有具体数词时，用单数形式，如果前没有具体数字，要用复数形式，后接of，“millions of”是一个固定短语，意为“数百万的”。故选D。 18．This expensive smartphone costs nearly ________ dollars in the American market. A．eight hundred and eighty-eight B．eight hundred eighty eight C．eight hundred eighty-eight D．eight hundreds and eighty-eight 【答案】A 【详解】考查基数词。句意：这款昂贵的智能手机在美国市场售价近888美元。根据选项可知，空处表示数字888，百位与十位之间要加and，十位与个位之间用连字符，hundred用单数形式，因此A项eight hundred and eighty-eight符合英语数字表达规范。故选A。 19．Wu Dajiang, a ________ Chinese skater, set a new world record at the Short Track World Cup last year. A．25-year-old B．25-years-old C．25 years old D．25year old 【答案】A 【详解】考查复合形容词的用法。句意：武大靖，一位25岁的中国滑冰运动员，在去年的短道速滑世界杯上创造了一项新的世界纪录。“数词-名词（单数）-形容词”构成复合形容词，用来修饰名词，A选项“25-year-old”符合该结构。故选A。 20．In our school, ________ students went to Beijing in 2008 and watched the Olympic Games. A．thousand of B．thousands of C．two thousands of D．two thousand of 【答案】B 【详解】考查数词。句意：在我们学校，成千上万的学生在2008年去了北京并观看了奥运会。thousand“千”，当前面有具体数字时，thousand用单数形式，也不与of连用，后面直接跟名词复数；当表示不确定的数量，即“成千上万的”时，用thousands of 。结合选项可知，thousands of表达正确。故选B。 21．The computer was cheap. I spent only two ________ yuan on it. A．thousands B．thousand C．thousands of D．thousand of 【答案】B 【详解】考查数词。句意：这台电脑很便宜。我只花了两千元买它。在英语中，thousand：千，表确定数目时，“基数词+thousand”，thousand用单数形式；不与介词of连用；表大概数目时，“thousands of”表示“成千上万的”。根据空前数词“two”，所以应该用thousand。故选B。 22．She went to the bookstore and bought ________. A．dozen books B．dozens books C．dozen of books D．dozens of books 【答案】D 【详解】考查量词。句意：她去书店买了许多书。a dozen of一打；dozens of 几十，很多，用法和hundred类似。由此可知，D项表达是正确的。故选D。 23．________ students will take part in the school sports meeting. A．Four hundreds B．Four hundred C．Four hundreds of D．Four hundred of 【答案】B 【详解】考查数词。句意：四百个学生将参加学校运动会。hundred“百”前面如果有具体数字时，hundred不变成复数，也不与of连用，其后直接加名词复数；只有表示不确定数目用“hundreds of”意为“数百”。故选B。 24．There is a _________bridge over the river. A．600 meters B．600-meter C．600 meter D．600-meters 【答案】B 【详解】考查复合形容词。句意：河上有一座 600 米长的桥。根据复合形容词“数词-名词（单数）”修饰名词的规则可知，“600-meter”符合语境，故选B。 25．I saw a snake ________ on the hill yesterday. A．5-meters-long B．5-meter-long C．5 meters long D．5 meter long 【答案】C 【详解】考查复合形容词及长度表达。句意：昨天我在山上看到一条5米长的蛇。复合形容词（数词-单数单位名词-形容词）一般作前置定语，而此处作宾语“snake”的补足语，用“数词 + 单位名词（复数） + 形容词”结构，用于补充说明蛇的长度，“5 meters long”符合该结构。故选C。 26．Steve is ________ and he has a ________ sister. A．13-year-old; 10 years old B．13 years old; 10-year-old C．13 years old; 10-years-old D．13-years-old; 10-years-old 【答案】B 【详解】考查复合形容词和年龄的表达。句意：Steve十三岁，他有一个十岁的妹妹。第一空处，空处作表语，描述主语Steve的具体年龄，用“基数词+year(s)+old”结构，当数词大于1时，year要用复数形式，所以第一空用13 years old；第二空处，空处作定语修饰名词sister，表达“几岁的”，常用复合形容词“基数词-year-old”，因此第二空用10-year-old。故选B。 27．Please turn to Page ________ and take a look at the picture. A．the eightieth B．Eightieth C．Eighties D．Eighty 【答案】D 【详解】考查基数词。句意：请翻到第八十页，看看这张图片。A. the eightieth第八十；B. Eightieth第八十；C. Eighties它可以表示一个时间段；D. Eighty八十。“Page+基数词单数”表示“第几页”。故选D。 28．— How long will you stay here? — ________. A．Two and half week B．Two and a half week C．Two weeks and a half D．A half and two weeks 【答案】C 【详解】考查数词与名词搭配用法。句意：——你会在这儿待多久？——两周半。根据问句“How long will you stay here?”可知，答句需填入表示“时长”的正确表达。“half”修饰可数名词时，若名词前有“a”或数词，名词需用复数形式；“两周半”的正确表达有两种“two weeks and a half ”或“two and a half weeks”。故选C。 29．The actor entered the film industry in ________ when he was in ________. A．the 1970s; twentieth B．1970; the twenties C．the 1970s; his twenties D．1970s; his twenties 【答案】C 【详解】考查数词和时间表达。句意：这个男演员在20世纪70年代进入电影行业，当时他20多岁。在英语中，“in the+年份复数形式”表示“在几十世纪几十年代”因此第一空用the 1970s；“in one’s+逢十的基数词的复数”表示“在某人几十多岁时”，因此第二空用his twenties。故选C。 30．It took me ________ to finish my homework. A．a half and two hour B．two hour and a half C．two and a half hour D．two and a half hours 【答案】D 【详解】考查基数词和名词单复数。句意：我用了两个半小时完成家庭作业。hour：小时，可数名词，前面有基数词two，hour要用复数形式hours。“two and a half hours”或“two hours and a half”是固定用法，意为“两个半小时”。故选D。 31．It was in ________ when she was in ________ that she went to Shanghai. A．the 1980s; the twenties B．the 1980s; her twenties C．1980’s; her twenties D．1980’s; the her twenties 【答案】B 【详解】考查数词。句意：在20世纪80年代，当她20多岁时，她去了上海。第一空，考查年代世纪表达法：in the +年代+ -s/’s，“20世纪80年代”应表达为“in the 1980s/1980’s”；第二空，考查年龄表达法（在某人几十岁的时候）：in +one’s+整十基数词的复数形式，“在他20几岁的时候”应表达为“in her twenties ”。故选B。 32．Karl Marx, was born in Germany ________ ago. A．the two hundredth year B．two hundred-year C．two hundred years D．two hundreds years 【答案】C 【详解】考查数词和名词单复数。句意：卡尔·马克思，两百年前生于德国。此处表示“两百年”，应用基数词，year是可数名词，应用其复数形式，因此“两百年前”译为“two hundred years ago”。故选C。 33．— Your grandpa looks just in his ________. — Ha-ha. He is going to celebrate his 80th birthday soon. A． sixty B．sixties C．sixtieth D．the sixties 【答案】B 【详解】考查基数词。句意：——你爷爷看起来才六十多岁。——哈哈。他很快就要庆祝他的80岁生日了。固定搭配“in one’s sixties”表示“某人六十多岁”。故选B。 34．She is ________, but she looks young. A．in her fifties B．at her fifty C．in her fifty D．at her fifties 【答案】A 【详解】考查数词及年龄的表达。句意：她五十多岁了，但看起来很年轻。“in one’s +整十的复数形式”是固定搭配，意为“在某人几十多岁时”。“五十多岁”应用“in her fifties”表示。故选A。 35．When the accident happened, I was only __________. A．six-year-old B．six-years-old C．six years old D．six year old 【答案】C 【详解】考查年龄表达法。句意：事故发生时，我只有六岁。“six-year-old”是复合形容词，只能作定语修饰名词，不能单独作表语，且复合形容词中名词用单数形式。“six years old”作表语，用于说明年龄。分析句子可知，空处在句中作表语，应用six years old。故选C。 36．Several ________ died of water pollution last winter. A．hundreds villagers B．hundred of villagers C．hundreds of villager D．hundred villagers 【答案】D 【详解】考查数词和名词的数。句意：去年冬天，数百名村民死于水污染。当“hundred”前有具体数字（如 one, two, several）修饰时，使用单数形式“hundred”，且接复数名词；当表示不确切的数量时，使用“hundreds of+复数名词”，意为“数百个……”。故选D。 37．I have lost my watch and I have to buy ________. A．one B．ones C．it D．that 【答案】A 【详解】考查代词和数词辨析。句意：我的手表丢了，我得再买一块。A. one一个，通常用来泛指同类事物中的一个；B. ones是one的复数形式，用来泛指多个同类事物；C. it它，人称代词，通常用来特指上文提到过的某个事物。D. that指示代词，常用于比较结构中，指代前文提到的不可数名词或单数可数名词（特指）。在这个上下文中，因为说话者只是说“我”丢了手表，要买一只，所以“one”可以用来泛指任何一只手表，符合语境。故选A。 38．Do you want to buy ________ pork? A． half kilo B．half a kilo C．a kilo half D．a half kilo 【答案】B 【详解】考查数量表达。句意：你想买半公斤猪肉吗？分析句子结构及选项可知，当half 修饰可数名词单数时，需用“ half a /an +名词单数” 结构，此处表达“半公斤”，正确表达是“half a kilo”。 故选B。 39．Tom became a soldier in ________. He was in ________ at that time. A．1990’s; twenties B．the 1990’s; his twenties C. the 1990’s; the twenties D．1990’s; the twenties 【答案】B 【详解】考查数词。句意：汤姆在20世纪90年代成为了一名士兵。那时他二十多岁。 在英语中，表示“……世纪……年代”时，应在年代前加定冠词the，且年份后需加“’s”或“s”，所以“20世纪90年代”应表达为the 1990’s或the 1990s； 表示“在某人几十岁时”，应用“in one’s+整十数的复数形式”，所以“他二十多岁”应表达为in his twenties。 故选B。 40．On ________, there will be ________ people in the church, taking part in the celebration. A．October three; thousand B．October third; thousands C．October 3rd; thousands of D．October the third; thousand of 【答案】C 【详解】考查时间表达法和数词用法。句意：在10月3日，教堂里将会有成千上万的人参加庆祝活动。第一空，英语中日期表达法：月份＋序数词/数字，空处表示“10月3日”，应用October third (3rd)/3；第二空，当thousand前其前无具体数字时，使用“thousands of +名词”，意为“成千上万的人或事物”，如果thousand前有具体数字时，使用“基数词+thousand+名词”，意为“……千人或事物”；此题thousand前无基数词，需用“thousands of people”。故选C。 试卷第1页，共3页 原创精品资源学科网独家享有版权，侵权必究！ 学科网（北京）股份有限公司 $