题海网,海量题库;找题库、找试卷、找答案就上题海网。

阅读下面文字,按要求作文。

在武汉封城的最危险的关头,有那些逆流而上的志愿者奔赴江城,留下了坚定的足印;在方舱医院里的患者朝不保夕的时候,有黄玉婷、杨一帆这些逆流而上的苦读学生,展现出最美的身影;当疫情为我们整个社会按下了暂停键的期间,有医生、警察、保安、快递员这些逆流而上的人,维持了这个城市的正常运转……人生的道路上总是充满了风浪与挑战,只有逆流而上的你,才能铸就属于自己的辉煌。

请以“逆流而上”为题,写一篇作文。

要求:①将题目抄写在答题卡作文纸的第一行(题目前空四格);

②文体自选(诗歌、戏剧除外);

③不要套作,不得抄袭;

④不少于600字;

⑤文章不得出现真实的人名、校名、班级名。

如图,在正方形网格中, 的顶点在格点上,请仅用无刻度直尺完成以下作图(保留作图痕迹).

( 1 )在图1中,作 关于点 对称的

( 2 )在图2中,作 绕点 顺时针旋转一定角度后,顶点仍在格点上的

一只电水壶的额定电压为220V,正常工作1min消耗的电能为6.6×104J.求:
  1. (1) 电水壶的额定功率;
  2. (2) 电水壶正常工作时的电流.
二项式 的展开式中常数项为
我国自古就有“三皇五帝”的传说,后来皇帝成为了封建国家最高统治者的称谓。请问它的出现与谁有直接关系(    )

A . 秦始皇嬴政 B . 汉高祖刘邦 C . 隋文帝杨坚 D . 宋太祖赵匡胤
我会连。

在学校,有了事情找哪里?

补写出下列句子中的空缺部分。
  1. (1) 苏轼在《赤壁赋》中追述了曹军攻破荆州、沿江而下的景象,接着用“”两句表现了英雄的志得意满。
  2. (2) 《蜀道难》中,李白从剑阁的险要引出对政治形势的描写,他劝人警惕战乱的发生,警惕蜀中“猛虎、长蛇”的“”凶残性。
  3. (3) 《琵琶行》中,写琵琶女早年技高貌美,盛极一时,现在却飘零沦落,今昔对比之下,借梦表现她这种悲叹的句子是“”。

某同学研究铝及其化合物的性质时设计了如下两个实验方案.

方案一:

方案二:

已知:NaOH溶液和稀盐酸的浓度均是3mol•L1 , 如图是向X溶液和Y溶液中分别加入NaOH溶液和稀盐酸时产生沉淀的物质的量与加入盐酸和氢氧化钠溶液体积之间的关系,下列说法正确的是(  )

A . 在O点时两方案中所得溶液的溶质物质的量相等 B . b曲线表示的是向X溶液中加入NaOH溶液 C . X溶液溶质为AlCl3 , Y溶液溶质为NaAlO2 D . a、b曲线表示的反应都是氧化还原反应
阅读理解

At the Green Free School in Copenhagen, Denmark, education is all about sustainability(可持续性). There are no desk, no blackboards and no tests. Students spend much of their time studying outdoors.

A group of 12 children are sitting in a circle when the bell rings. Instead of rushing to their next class, the children close their eyes. "Raise your hand when you can no longer hear a sound," says their teacher, holding a pair of bronze cymbals. One by one, their hands go up.

"I've always learned how to be around the world in a respectful(尊重的)way. To me, it's important to create a school that would think about the green transition (过渡) we are going through," says Phie Ambo, who started the school in 2014.

Now there're about 200 students at the school. According to Ambo, some parents come because of the green transition. And some come because it's a small school and they want a closer relation to the whole school society." In Denmark we have some super schools with thousands of children and a lot of people aren't comfortable with this," Ambo explains.

The school not only serves healthy food, but it allows kids to bring whatever they want to eat. "It's to show our kids that making the whole green transition can be fun and nice and it's not about not doing things," Ambo says. "We're all taking the first steps and learning from each other."

  1. (1) What do we know about students at the Green Free School?
    A . They are good at gardening. B . They take a test once a month. C . They don't have any classrooms. D . They stay outside most of the time.
  2. (2) What does the second paragraph describe?
    A . The beauty of the school. B . The green transition of the school. C . One of the teachers at the school. D . One of the classes at the school.
  3. (3) Which question does Paragraph 4 try to answer?
    A . Why did Ambo start the school? B . Why do parents choose the school? C . What challenges is the school facing? D . What lessons do children learn at the school?
  4. (4) What does the Green Free School want to do?
    A . To encourage students to learn from each other. B . To help students develop interests and hobbies. C . To prepare students for the green transition. D . To tell students to live happily and healthily.
方成同学看到一则材料:甲开汽车,乙骑自行车从M地出发沿一条公路匀速前往N地.设乙行驶的时间为t(h),甲乙两人之间的距离为y(km),y与t的函数关系如图1所示.

方成思考后发现了如图1的部分正确信息:乙先出发1h;甲出发0.5小时与乙相遇.

请你帮助方成同学解决以下问题:

  1. (1) 分别求出线段BC,CD所在直线的函数表达式;
  2. (2) 当20<y<30时,求t的取值范围;
  3. (3) 分别求出甲,乙行驶的路程S , S与时间t的函数表达式,并在图2所给的直角坐标系中分别画出它们的图象;
  4. (4) 丙骑摩托车与乙同时出发,从N地沿同一公路匀速前往M地,若丙经过 h与乙相遇,问丙出发后多少时间与甲相遇?
杨杨同学利用如图实验装置探究串联电路中电压的规律。请回答下列问题:

图片_x0020_100009

  1. (1) 当杨杨连接好如图电路,闭合开关,两灯都发光,读出电压表示数。为了测出灯L2两端的电压,杨杨在保持连接电压表的a导线不动的情况下,只将b导线与L1连接的一头改接到灯L2左端的接线柱,则他(填“能”或“不能”)测出灯L2两端的电压;
  2. (2) 杨杨通过实验正确地测出灯L1两端的电压U1=1.5V,灯L2两端的电压U2=1.5V,电路总电压U=3V。要想进一步探究串联电路的电压的规律,则杨杨下一步应该做的是:,再测出几组电压值。
你想建议你的朋友吃一个热狗,你不可以说:
A . Would you like a hot dog? B . What about a hot dog? C . This is a hot dog.
I like (run). I can (run) very fast.
阅读短文《小麻雀》片段,根据课文内容填空
普季克又害怕又着急,一下子竟从地上飞了起来,落到了窗台上。紧跟着,妈妈也飞了起来,可尾巴上的羽毛却让扑上来的大花猫咬掉了。不过,,蹲在普季克身边,啄啄他的后脑勺,地问:“怎么样?怎么样?”
计算:
  1. (1)
  2. (2)
My parents always         /səˈpɔːt/ my hobbies of sports.
A . supper B . surprise C . suppose D . support
二十四节气中的春分与秋分均为太阳直射赤道,春分为太阳从南回归线回到赤道,秋分则为太阳从北回归线回到赤道.2004年3月20日为春分,9月23日为秋分,可以推算从春分到秋分187天,而从秋分到春分则为179天.关于上述自然现象,下列说法正确的是(设两段时间内地球公转的轨迹长度相等)( )

A . 从春分到秋分地球离太阳远 B . 从秋分到春分地球离太阳远 C . 夏天地球离太阳近 D . 冬天地球离太阳远
下列关于分子和原子的描述正确的是(   )
A . 在原子里,质子数等于中子数 B . 液氧和氧气都能助燃,说明同种分子化学性质相同 C . 分离液态空气能得到氧气,说明分子可以再分 D . 与元素的化学性质最密切的是原子的核外电子数

读图(地球经纬网图),选择正确的说法(  )

A . 图中经线①是东西半球的分界线 B . 图中纬线②是南北半球的分界线 C . 图中④地的地理坐标是20°S,40°W D . 图中③地的地理坐标是60°N,60°E
am I things selling(.)(连词成句)
教材章节知识点
年级分类
最近更新