Unit 5 Here and Now 单元语法(现在进行时)-2025-2026学年七年级英语下册单元练习(人教版)

2026-05-09
| 2份
| 16页
| 763人阅读
| 11人下载
初高中英语资料大全
进店逛逛

摘要:

**基本信息** 聚焦初中英语Unit 5“Here and Now”单元,以现在进行时为核心,通过选择、拼写、句型转换三维度考查,适配单元复习,强化语言运用与思维品质。 **题型特征** |题型|题量/分值|知识覆盖|命题特色| |----|-----------|----------|----------| |单项选择|30题/60分|现在进行时结构、时间标志词(Look! now)|对话情境(请求帮助、询问位置),基础巩固| |单词拼写|10题/20分|动词现在分词(lie→lying, shop→shopping)|日常活动场景(海滩、超市),语言输出| |完成句子|10题/20分|句型转换(划线提问、改写now)、汉译英|综合应用(连词成句、情境描述),思维品质培养|

内容正文:

班级 姓名 学号 分数 Unit 5 Here and Now 现在进行时 (时间:60分钟,满分:100分) 一、单项选择(本大题共30小题,每小题2分,共60分) 1.—Can you help me clean the room, Mike? —Wait a moment. I _______ Ella with her Chinese. A.help B.helps C.helping D.am helping 【答案】D 【详解】句意:——迈克,你能帮我打扫房间吗?——等一下。我正在帮助艾拉学中文。 根据“Wait a moment.”可知,此处表示现在正在做某事,应用现在进行时,其结构为“be动词+动词现在分词”,主语为“I”,be动词用am,此处应用am helping。 2.—Do you like rainy days, Mike? —Yes. Rainy days make me relaxed. I love watching TV while it ________. A.rains B.rain C.raining D.is raining 【答案】D 【详解】句意:——迈克,你喜欢下雨天吗?——是的。下雨天使我放松。我喜欢在下雨的时候看电视。 根据“while”可知,此处表示在下雨的时候,用现在进行时,结构为“be+doing”,主语“it”是第三人称单数,be动词用is。应填is raining。 3.—Where is Mike? —He ________ for the test in the classroom now. A.studies B.is studying C.studied D.will study 【答案】B 【详解】句意:——迈克在哪里?——他现在正在教室里为考试而学习。 根据“now”可知,句子描述的是现在正在发生的动作,因此应该使用现在进行时,结构为“be+动词的现在分词”。应填is studying。 4.Look! The boys ________ basketball on the playground. A.play B.plays C.playing D.are playing 【答案】D 【详解】句意:看!男孩们正在操场上打篮球。 根据“Look!”可知,此处表示正在发生的动作,用现在进行时,结构为“be+现在分词”,主语“The boys”是复数,be动词用are,应填are playing。 5.Look! Peter ________ his baseball lesson. A.has B.is having C.had 【答案】B 【详解】句意:看!彼得正在上她的棒球课。 根据“Look!”可知,动作此时此刻正在发生,应用现在进行时,结构为“be+动词-ing”,所以用is having。 6.—Lily, what are you doing? —I _______ in the park. A.am jog B.jogging C.am jogging 【答案】C 【详解】句意:——莉莉,你正在做什么?——我正在公园里慢跑。 根据“what are you doing”可知,该句是现在进行时,其谓语结构是:be+动词的现在分词,主语是“I”,be动词用am,“jog”的现在分词是“jogging”。 7.— ________ your mother ________ on the phone? — No, she isn’t. She is doing some washing. A.Does; talk B.Is; talking C.Do; talk D.Are; talking 【答案】B 【详解】句意:——你妈妈正在打电话吗?——不,她没有。她正在洗衣服。 根据答语“She is doing some washing.”可知用现在进行时,且主语是单数your mother,应使用Is; talking。应填Is; talking。 8.—Where is your mother, Jenny? —She ________ a book in the room now. A.reads B.will read C.read D.is reading 【答案】D 【详解】句意:——珍妮,你妈妈在哪里?——她现在正在房间里看书。 根据时间状语“now”可知,句子描述的是正在进行的动作,应用现在进行时,结构为“be+动词现在分词”;主语she是第三人称单数,be动词用is,read的现在分词是reading,应填is reading。 9.The students ________ their homework every day. Now they ________ their homework. A.are doing; do B.does; doing C.do; are doing 【答案】C 【详解】句意:学生们每天做作业。现在他们正在做作业。 第一空,根据“every day”可知,表示经常性习惯性的动作,用一般现在时,主语The students是复数,谓语动词用原形 do;第二空,根据“Now”可知,表示此刻正在进行的动作,用现在进行时,结构为be+doing,主语they对应be动词are。应填do; are doing。 10.Look! My father ________ his car over there. A.washes B.washed C.wash D.is washing 【答案】D 【详解】句意:看!我爸爸正在那边洗他的车。 washes洗,第三人称单数;washed洗,过去式;wash洗,动词原形;is washing正在洗,现在进行时。根据“Look!”可知,表示此刻正在做某事,时态为现在进行时,其构成为主语+be+动词-ing。主语My father是第三人称单数,be动词用is。故选D。 11.Don’t make any noise. The scientists ________ a meeting about the environment. A.have B.are having C.has D.is having 【答案】B 【详解】句意:不要制造任何噪音。科学家们正在开一个关于环境的会议。 根据“Don’t make any noise.”可知,提醒现在不要吵闹,说明会议正在进行中,应用现在进行时,其结构为“be+doing”;主语The scientists为复数,be动词应用are。故选B。 12.Look! The number of visitors _________ quickly these days. A.rise B.rises C.is rising D.are rising 【答案】C 【详解】句意:看!这几天游客的数量正在迅速上升。 根据“Look!”和“these days”可知,动作正在发生,应用现在进行时,主语“The number of...”意为“……的数量”,谓语动词用单数,应填is rising。 13.My mother _________ dinner in the kitchen. A.cook B.cooks C.are cooking D.is cooking 【答案】D 【详解】句意:我妈妈正在厨房做晚饭。 cook动词原形;cooks动词三单形式;are cooking现在进行时复数形式;is cooking现在进行时单数形式。主语My mother是第三人称单数,排除A、C。虽然句中没有明显的时间标志词,但此类语境通常描述此刻正在发生的动作,应用现在进行时。 14.—Listen! Someone ________ your name. —Oh, it’s my mom. A.will call B.is calling C.calls 【答案】B 【详解】句意:——听!有人在叫你的名字。——哦,是我妈妈。 考查现在进行时。根据“Listen!”可知,此处表示正在发生的动作,需用现在进行时,其构成为“am/is/are doing”。故选B。 15.—Where is Xiao Ya? I can’t find her. —She ________ the guitar in the music club. A.play B.plays C.is playing 【答案】C 【详解】句意:——小雅在哪里?我找不到她。——她正在音乐俱乐部弹吉他。 考查动词时态。根据“Where is Xiao Ya? I can’t find her.”可知,此处是询问小雅此刻在哪里,答句应回答她此刻正在做的事情,所以用现在进行时is playing。故选C。 16.—How’s your summer vacation ________? —It’s great. I’m having a good time. A.have B.going C.do D.does 【答案】B 【详解】句意:——你的暑假过得怎么样?——很棒,我玩得很开心。 考查现在进行时。have有;going进行;do做;does做,第三人称单数。问句“How’s...going?”是固定口语表达,意为“……进展如何?”,此处“How’s your summer vacation going?”相当于询问暑假过得怎么样。故选B。 17.—Where is your brother, Tony? —He ________ a toy plane in the study. A.make B.makes C.is making 【答案】C 【详解】句意:——你哥哥托尼在哪里?——他正在书房里制作一架玩具飞机。 考查现在进行时。根据“Where is your brother, Tony?”可知,此处询问托尼在哪里,答语应说明他正在进行的动作,强调此刻正在制作玩具飞机,需用现在进行时。故选C。 18.Don’t make noise! The students ________ an exam in the classroom at the moment. A.take B.takes C.are taking D.took 【答案】C 【详解】句意:别吵!学生们此刻正在教室里考试。 考查动词时态。根据“at the moment”可知,句子时态是现在进行时,其结构是“be+动词的现在分词”,主语“The students”是复数,be动词用are,take的现在分词是taking。故选C。 19.—Jane, is the boy over there your brother? —No, he isn’t. My brother ________ with his friend in the classroom. A.draw B.draws C.is drawing 【答案】C 【详解】句意:——简,那边那个男孩是你弟弟吗?——不,他不是。我弟弟正在教室里和他的朋友画画。 考查现在进行时。根据“My brother…with his friend in the classroom.”可知,此处描述的是说话时正在发生的动作,应使用现在进行时(am/is/are+doing)。故选C。 20.—Where are the twins? I can’t find them. —They ________ photos of the flowers in the garden now. A.take B.are taking C.will take D.took 【答案】B 【详解】句意:——双胞胎在哪里?我找不到他们。——他们现在正在花园里给花拍照。 考查动词时态。根据答句中“now”可知,该句描述的是现在正在发生的动作,即双胞胎此刻正在花园里拍花的照片,所以应该用现在进行时,其结构为“be动词+动词的现在分词”,主语“They”是复数,be动词用“are”,“take”的现在分词是“taking”,所以用“are taking”。故选B。 21.Look! The children _______ kites in the park. A.fly B.flying C.are flying D.flew 【答案】C 【详解】句意:看!孩子们正在公园里放风筝。 考查动词的时态。fly放,一般现在时,主语是复数或第一、二人称的单数;flying放,现在分词;are flying正在放,现在进行时,主语是复数;flew放,一般过去时。根据“Look!”可知,此处表示动作正在发生,使用现在进行时,表示“孩子们正在放风筝”,故选C。 22.Look! The baby ________. A.is crying B.to cry C.cried 【答案】A 【详解】句意:看!这个婴儿正在哭。 考查时态。根据“Look!”可知,此处应用现在进行时,结构为“be动词+现在分词”,主语“The baby”是第三人称单数,be动词用is,cry的现在分词是crying。故选A。 23.—Where’s your uncle? I can’t find him. —Maybe he ________ flowers in the garden. A.waters B.is watering C.will water D.watered 【答案】B 【详解】句意:——你叔叔在哪里?我找不到他。——也许他正在花园里浇花。 考查现在进行时。根据“Where’s your uncle?”可知,空处表示现在正在进行的动作,应用现在进行时。故选B。 24.Listen! A girl ________ an English song in the classroom. A.sings B.singing C.is sing D.is singing 【答案】D 【详解】句意:听!一个女孩正在教室里唱英语歌。 考查现在进行时。根据“Listen!”可知,这个女孩正在唱歌,用现在进行时be doing,故选D。 25.Mary can dance well. She is ________ on the playground now. A.dance B.dances C.dancing 【答案】C 【详解】句意:Mary跳舞跳得很好。她现在正在操场上跳舞。 考查动词时态。根据“now”可知,描述正在进行的动作,故要用现在进行时:am/is/are doing。故选C。 26.Look, Amy ________ an interesting story. A.is reading B.reads C.will read 【答案】A 【详解】句意:看,艾米正在读一个有趣的故事。 考查时态。根据“Look”可知,此处强调动作正在发生,要用现在进行时,主语是Amy,结构为is+动词的现在分词形式。故选A。 27.—Where is Judy? —She ________ a snowman over there! Let’s have fun together! A.built B.builds C.is building 【答案】C 【详解】句意:——朱迪在哪里?——她正在那儿堆雪人呢!我们一起玩得开心点吧! 考查时态。根据“Where is Judy?”和“She...a snowman over there!”可知,朱迪现在正在那里堆雪人,用现在进行时“am/is/are doing”。故选C。 28.Look! Some children ________ litter in the park. A.collect B.collects C.are collecting 【答案】C 【详解】句意:看!一些孩子正在公园里收集垃圾。 考查现在进行时。根据“Look!”可知,此句时态为现在进行时,其结构为“am/is/are doing”。故选C。 29.Look! Our Chinese teacher ________ a talk in the meeting room. A.give B.is giving C.giving D.gives 【答案】B 【详解】句意:看!我们的语文老师正在会议室做报告。 考查现在进行时。give动词原形;is giving现在进行时;giving现在分词/动名词;gives动词第三人称单数形式。根据“Look!”可知,此处表示正在进行的动作,句子时态为现在进行时,其结构为“be+现在分词”,主语“Our Chinese teacher”是第三人称单数,be动词用is,give的现在分词是giving。故选B。 30.The man is shouting and ________ after the bus. A.run B.ran C.running D.runs 【答案】C 【详解】句意:那个男人正在大喊大叫并追赶公交车。 考查现在进行时的用法。根据“is shouting”可知,此处表明动作正在进行,结构为is doing。空格处与“shouting”由and连接,是并列关系,用现在分词的running。故选C。 二、单词拼写(本大题共10小题,每小题2分,共20分) 31.—Where is Tom? —He ________ (lie) on the beach, enjoying the sun. 【答案】is lying 【详解】句意:——汤姆在哪里?——他正躺在沙滩上,享受阳光。根据语境,此处描述的是正在进行的动作,需用现在进行时(be + 现在分词);主语He是第三人称单数,be动词用is,lie(躺)的现在分词形式是lying。 32.—Why are you in a hurry, Jack? —My father ________ (wait) for me at the school gate. 【答案】is waiting 【详解】句意:——杰克,你为什么这么匆忙?——我爸爸正在学校门口等我。根据“Why are you in a hurry”可知,询问的是当下正在发生的事情,所以回答要用现在进行时,其结构是“be+动词的现在分词”;主语“My father”是第三人称单数,be动词用is;wait的现在分词是waiting。故填is waiting。 33.The cows are ________ (eat) grass happily. 【答案】eating 【详解】句意:奶牛们正在开心地吃草。句中出现了be动词are和副词happily,结合语境可知本句描述的是正在进行的动作,应使用现在进行时,其结构为“be动词 + 动词的现在分词”。动词eat的现在分词形式直接在词尾加-ing,故填eating。 34.My brother and I are ________ (shop) in the supermarket now. 【答案】shopping 【详解】句意:我和弟弟现在正在超市购物。时间标志词now说明动作正在发生,要用现在进行时,结构为be+动词现在分词,shop的现在分词为shopping。 35.Our family are ________ (take) part in a boat tour now. 【答案】taking 【详解】句意:我们一家人现在正在参加乘船游览。根据“now”可知,句子时态为现在进行时,其结构为“am/is/are + 动词的现在分词”,take的现在分词是taking。 36.Listen! Somebody ________ (sing) in the hall. 【答案】is singing 【详解】句意:听!大厅里有人唱歌。根据“Listen”可知,这是现在进行时,所以要用be+doing。故填is singing。 37.—What are you doing at the beach? —I ________ (play) beach volleyball. 【答案】am playing 【详解】句意:——你在海滩上做什么?——我正在打沙滩排球。问句使用现在进行时(are doing),答句需保持时态一致,用现在进行时(am/is/are + 现在分词);主语是I,be动词用am,play的现在分词是playing。 38.The children are ________ (write) about honest behaviors. 【答案】writing 【详解】句意:孩子们正在写关于诚实行为的内容。句中出现are,结合语境可知这是现在进行时,结构为be + 现在分词,表示“正在做某事”。动词write的现在分词形式需要去掉不发音的e,再加ing,即writing。 39.Look! The students ________ (discuss) honesty in the classroom. 【答案】are discussing 【详解】句意:看!学生们正在教室里讨论诚信。分析句子结构可知,空格在句中充当谓语。根据句中的提示词Look! 可知,此处描述正在进行的动作,应用现在进行时,结构为 “be 动词 + 现在分词”。主语The students是复数,be动词用are;动词discuss(讨论)的现在分词形式为discussing。故填are discussing。 40.—What is your sister doing? —She ________ (do) her homework. 【答案】is doing 【详解】句意:——你的姐姐/妹妹正在做什么?——她正在做她的家庭作业。do“做”,动词;问句是现在进行时,答句也要用现在进行时,结构为“be + 现在分词”,主语是She,be动词用is,do的现在分词是doing。故填is doing。 三、完成句子(本大题共10小题,每小题2分,共20分) 41.The children are playing basketball on the playground. (对划线部分提问) ________ are the children ________ on the playground? 【答案】 What doing 【详解】句意:孩子们正在操场上打篮球。原句划线部分“playing basketball”是正在做的事情,所以要用特殊疑问词“What”来提问;原句是现在进行时,变成特殊疑问句时,结构为:“What+be动词+主语+doing+其他?”。故填What;doing。 42.They usually stay in when it snows. (用now改写句子) →_________________________________ 【答案】They are staying in now. 【详解】句意:下雪的时候他们通常待在家里。句子是一般现在时的肯定句,用now“现在”改写后,句子是现在进行时,其结构是“be+动词的现在分词”,主语they是复数,be动词用are;stay的现在分词是staying。 43.It’s snowing now. (改为一般疑问句) →_________________________________ 【答案】Is it snowing now? 【详解】句意:现在正在下雪。句子是现在进行时的肯定句,改为一般疑问句时要把be动词is提前,句首字母要大写,句末用问号,其他部分不变。 44.我的父亲正在看报纸。 My father ________ ________ a newspaper now. 【答案】 is reading 【详解】原句中“正在看”是关键词,表示“看报纸”的动词短语是read a newspaper。now表示时态为现在进行时,结构为“be + 现在分词”,主语father为单数,be动词用is,read用现在分词reading。 45.Daniel plans to go fishing with his friends this weekend. (用at the moment改写句子) Daniel ________ ________ to go fishing with his friends at the moment. 【答案】 is planning 【详解】句意:丹尼尔计划这周末和他的朋友们一起去钓鱼。要求用at the moment改写句子,则时态需用现在进行时“am/is/are+动词的现在分词”,主语Daniel是第三人称单数,be用is;plan的现在分词形式是planning。 46.Tim usually exercises in the morning. (用at the moment改写句子) Tim ________ ________ at the moment. 【答案】 is exercising 【详解】句意:蒂姆通常在早上锻炼。at the moment是现在进行时的标志,现在进行时结构是be doing,主语是Tim,be动词用is,谓语动词原形exercise的现在分词是exercising。 47.用所给疑问词将陈述句改为特殊疑问句。 Peter is watering the plants right now. Who _______________________? 【答案】is watering the plants right now 【详解】句意:彼得此刻正在给植物浇水。原句时态为现在进行时,谓语动词“is watering”为“be动词 + 现在分词”结构;疑问词Who用于提问人,对应原句的主语“Peter”,Who作主语时句子用陈述语序,be动词、现在分词及其余成分保持不变,直接跟在Who后即可。 48.about, where, this, they, to, talking, go, weekend, are  (连词成句) ________________________________________________. 【答案】They are talking about where to go this weekend 【详解】根据所给单词和标点符号可知,本句为陈述句且时态为现在进行时。“They”他们,句首首字母大写,作主语;“are talking about”正在谈论,现在进行时结构作谓语;“where to go”去哪里,疑问词+不定式结构作宾语;“this weekend”这个周末,作时间状语。 49.我们后边的那个男孩正在拉小提琴。 The boy behind us ________________. 【答案】is playing the violin 【详解】原句中“正在拉小提琴”是关键词,表示“正在做某事”需用现在进行时(be+动词-ing形式),“拉小提琴”的固定短语是play the violin。主语“The boy”为第三人称单数,be动词用is。 50.看!他们在操场玩得非常开心。 Look! They ________ ________ great fun on the playground. 【答案】 are having 【详解】原句缺少关键词“玩得开心”,have fun符合题意,是固定短语,结合“Look”可知,该句是现在进行时,主语是“They”,be动词改为are,动词改为现在分词having。 试卷第1页,共3页 试卷第1页,共3页 学科网(北京)股份有限公司 $ 班级 姓名 学号 分数 Unit 5 Here and Now 现在进行时 (时间:60分钟,满分:100分) 一、单项选择(本大题共30小题,每小题2分,共60分) 1.—Can you help me clean the room, Mike? —Wait a moment. I _______ Ella with her Chinese. A.help B.helps C.helping D.am helping 2.—Do you like rainy days, Mike? —Yes. Rainy days make me relaxed. I love watching TV while it ________. A.rains B.rain C.raining D.is raining 3.—Where is Mike? —He ________ for the test in the classroom now. A.studies B.is studying C.studied D.will study 4.Look! The boys ________ basketball on the playground. A.play B.plays C.playing D.are playing 5.Look! Peter ________ his baseball lesson. A.has B.is having C.had 6.—Lily, what are you doing? —I _______ in the park. A.am jog B.jogging C.am jogging 7.— ________ your mother ________ on the phone? — No, she isn’t. She is doing some washing. A.Does; talk B.Is; talking C.Do; talk D.Are; talking 8.—Where is your mother, Jenny? —She ________ a book in the room now. A.reads B.will read C.read D.is reading 9.The students ________ their homework every day. Now they ________ their homework. A.are doing; do B.does; doing C.do; are doing 10.Look! My father ________ his car over there. A.washes B.washed C.wash D.is washing 11.Don’t make any noise. The scientists ________ a meeting about the environment. A.have B.are having C.has D.is having 12.Look! The number of visitors _________ quickly these days. A.rise B.rises C.is rising D.are rising 13.My mother _________ dinner in the kitchen. A.cook B.cooks C.are cooking D.is cooking 14.—Listen! Someone ________ your name. —Oh, it’s my mom. A.will call B.is calling C.calls 15.—Where is Xiao Ya? I can’t find her. —She ________ the guitar in the music club. A.play B.plays C.is playing 16.—How’s your summer vacation ________? —It’s great. I’m having a good time. A.have B.going C.do D.does 17.—Where is your brother, Tony? —He ________ a toy plane in the study. A.make B.makes C.is making 18.Don’t make noise! The students ________ an exam in the classroom at the moment. A.take B.takes C.are taking D.took 19.—Jane, is the boy over there your brother? —No, he isn’t. My brother ________ with his friend in the classroom. A.draw B.draws C.is drawing 20.—Where are the twins? I can’t find them. —They ________ photos of the flowers in the garden now. A.take B.are taking C.will take D.took 21.Look! The children _______ kites in the park. A.fly B.flying C.are flying D.flew 22.Look! The baby ________. A.is crying B.to cry C.cried 23.—Where’s your uncle? I can’t find him. —Maybe he ________ flowers in the garden. A.waters B.is watering C.will water D.watered 24.Listen! A girl ________ an English song in the classroom. A.sings B.singing C.is sing D.is singing 25.Mary can dance well. She is ________ on the playground now. A.dance B.dances C.dancing 26.Look, Amy ________ an interesting story. A.is reading B.reads C.will read 27.—Where is Judy? —She ________ a snowman over there! Let’s have fun together! A.built B.builds C.is building 28.Look! Some children ________ litter in the park. A.collect B.collects C.are collecting 29.Look! Our Chinese teacher ________ a talk in the meeting room. A.give B.is giving C.giving D.gives 30.The man is shouting and ________ after the bus. A.run B.ran C.running D.runs 二、单词拼写(本大题共10小题,每小题2分,共20分) 31.—Where is Tom? —He ________ (lie) on the beach, enjoying the sun. 32.—Why are you in a hurry, Jack? —My father ________ (wait) for me at the school gate. 33.The cows are ________ (eat) grass happily. 34.My brother and I are ________ (shop) in the supermarket now. 35.Our family are ________ (take) part in a boat tour now. 36.Listen! Somebody ________ (sing) in the hall. 37.—What are you doing at the beach? —I ________ (play) beach volleyball. 38.The children are ________ (write) about honest behaviors. 39.Look! The students ________ (discuss) honesty in the classroom. 40.—What is your sister doing? —She ________ (do) her homework. 三、完成句子(本大题共10小题,每小题2分,共20分) 41.The children are playing basketball on the playground. (对划线部分提问) ________ are the children ________ on the playground? 42.They usually stay in when it snows. (用now改写句子) →_________________________________ 43.It’s snowing now. (改为一般疑问句) →_________________________________ 44.我的父亲正在看报纸。 My father ________ ________ a newspaper now. 45.Daniel plans to go fishing with his friends this weekend. (用at the moment改写句子) Daniel ________ ________ to go fishing with his friends at the moment. 46.Tim usually exercises in the morning. (用at the moment改写句子) Tim ________ ________ at the moment. 47.用所给疑问词将陈述句改为特殊疑问句。 Peter is watering the plants right now. Who _______________________? 48.about, where, this, they, to, talking, go, weekend, are  (连词成句) ________________________________________________. 49.我们后边的那个男孩正在拉小提琴。 The boy behind us ________________. 50.看!他们在操场玩得非常开心。 Look! They ________ ________ great fun on the playground. 试卷第1页,共3页 试卷第1页,共3页 学科网(北京)股份有限公司 $

资源预览图

Unit 5 Here and Now 单元语法(现在进行时)-2025-2026学年七年级英语下册单元练习(人教版)
1
Unit 5 Here and Now 单元语法(现在进行时)-2025-2026学年七年级英语下册单元练习(人教版)
2
相关资源
示范课
由于学科网是一个信息分享及获取的平台,不确保部分用户上传资料的 来源及知识产权归属。如您发现相关资料侵犯您的合法权益,请联系学科网,我们核实后将及时进行处理。