下列条件下，两瓶气体所含原子数一定相等的是（   ）

相同条件下，等物质的量的两种气体一定满足（　　）

用 N_A表示阿伏加德罗常数的值，下列叙述正确的是（   ）

阅读下面的材料，根据要求写作。

近年来“网红”事件层出不穷。新闻主持人教“普通话”，大学教授直播“国防教育”，医生开微博趣聊“生活保健”，乡村姑娘拍摄视频宣传田园生活，藏族小伙说“外面的世界很大，但我还是最爱我的家乡”获赞无数……然而也有“网红”篡改经典歌曲获取流量，遭到封杀，还有“网红”调侃历史吸人眼球，备受谴责。

请结合材料内容，联系现实，以“网红的责任”为主题写一篇议论文，表达你的认识与思考。

要求：自拟标题，自选角度，确定立意；不要套作，不得抄袭；不得泄露个人信息；不少于800字。

三种气体X、Y、Z的相对分子质量关系为M_r（X）＜M_r（Y）=0.5M_r（Z），下列说法正确的是（　　）

A～G是几种烃的分子球棍模型（如图）

据此回答下列问题：

在同温、同压条件下，两种物质的量相同的单质气体之间的关系是（　　）

①具有相同的密度 ②具有相同的体积 ③具有相同的原子数 ④具有相同的分子数

She likes everything to be ____________ before she stars work.

________ about fatness, she still has confidence in her performance of daily life.

已知直线l：ax+y=1在矩阵A=对应的变换作用下变为直线l′：x+by=1．

（1）求实数a，b的值；

（2）求矩阵A的特征值与特征向量．

阅读下而的文字，完成下面小题。

白河小镇是一个让人吃惊的地方，它是本省最大的莲花种植地，在小巷里走，在田野上（   ），都会在转折处看到一田田又大又美的莲花。那些经过细心栽培的莲花竟似天然生成，在大地的好风好景里毫无愧色，夏日里格外有一种欣悦的气息。

我去的时候正好是莲子收成的季节，种莲的人家都忙碌起来了，大人小孩全到莲田里去采莲子，对于我们这些只看过莲花美姿就叹息的人，永远也不知道种莲的人家是用怎样的辛苦在（   ）一池莲，使它开花结实。

莲花其实就是荷花，在还没有开花前叫“荷”，开花结果后就叫“莲”。我总觉得两种名称有不同的意义：荷花是（   ）观赏的，是诗人和艺术家的朋友；莲花带了一点生活的（   ），是种莲人生活的依靠。想起多年来我对莲花的无知，只喜欢在远远的高处看莲、想莲；却从来没有走进真正的莲花世界，看莲田背后生活的悲欢，不禁感到愧疚。

谁知道一朵莲蓬里的三十个莲子，是多少血汗的灌溉？谁知道夏日里一碗冰冻的莲子汤是农民多久的辛劳？

阅读下面的材料，根据要求写作。

年轻一代对年长一代的文化影响被称为“文化反哺”。在高速发展变化的当今社会，年轻一代获得了前所未有的反哺能力。他们在网络消费、饮食习惯、娱乐消遣、公共卫生等社会生活的方方面面，越来越明显地影响着年长一代。有长辈对此不以为然：年轻一代涉世尚浅，对年长一代的影响有限；也有长辈对此表示担忧：时代瞬息万变，年轻一代容易变得自大从而迷失自我。

作为年轻一代的代表，你该如何回应长辈的质疑或担忧？请据此写一篇文章，表达你的思考和认识。

要求：自拟标题，自选角度，确定立意：不要套作，不得抄袭；不得泄露个人信息：不少于800字。

下列有关说法正确的是（   ）

恒温、恒压下，将1mol O₂和2mol SO₂气体充入一体积可变的容器中（状态Ⅰ），发生反应2SO₂（g）＋O₂（g） 2SO₃（g），状态Ⅱ时达平衡，则O₂的转化率为（   ）

2－丁烯的结构简式正确的是（   ）

阅读下面的文言文，完成下题。

尉迟敬德名恭，朔州善阳人。武德二年，秦王战柏壁，与寻相^①举地降，引为右一府统军，从击王世充。

会寻相叛，诸将疑敬德且乱，囚之。尚书殷开山曰：“敬德慓敢，今执之，猜贰已结，不即杀，后悔无及也。”王曰：“不然。敬德必叛，宁肯后寻相者邪？”释之，引见卧内，曰：“丈夫以气相许，小嫌不足置胸中，我终不以谗害良士。”因赐之金，曰：“必欲去，以为汝资。”是日猎榆窠，会世充自将兵数万来战，单雄信者，贼骁将也，骑直趋王，敬德跃马大呼横刺，雄信坠，乃翼王出。率兵还战，大败之。王顾曰：“比众人意公必叛，我独保无它，何相报速邪？”赐金银一箧。

窦建德营板渚，时世充兄子琬使于建德，乘隋帝厩马，铠甲华整，出入军中以夸众。王望见，问“谁可取者？”敬德请驰往，禽琬，引其马以归，贼不敢动。

隐太子尝以书招之，赠金皿一车。辞曰：“敬德起幽贱，会天下丧乱，久陷逆地，秦王实生之，方以身徇恩。今于殿下无功，其敢当赐？若私许，则怀二心。徇利弃忠，殿下亦焉用之哉？”太子怒而止。敬德以闻。王曰：“公之心如山岳然，虽积金至斗，岂能移之？然恐非自安计。”巢王果遣壮士刺之。敬德开门安卧，贼至，不敢入。

其后隐、巢计日急，敬德入白曰：“大王不先决，社稷危矣！”王曰：“我惟同气，所未忍。伺其发，而后以义讨之，如何？”敬德曰：“人情畏死，众以死奉王，此天授也。天与不取，反得其咎。大王即不听，请从此亡，不能交手蒙戮。”王曰：“寡人之谋，未可全弃，公更图之。”敬德曰：“处事有疑非智，临难不决非勇。王今自计如何？勇士八百人悉入宫控弦被甲矣，尚何辞？”计乃定。

……隐太子死，王为皇太子，授左卫率。时坐隐、巢者百余家，将尽没入之。敬德曰：“为恶者二人，今已诛，若又穷支党，非取安之道。”由是普原。

[注]①寻相：人名。

下列化学用语或模型表示正确的是（　　）

已知二元一次方程组 的增广矩阵是 ，则此方程组的解是．

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

    The jobs of the future have not been invented, By helping them develop classic skills that will serve them well no matter what the future holds.

⒈Curiosity

    Your children need to be deeply curious. Ask kids, “What ingredients (配料) can we add to make these pancakes even better next time” and then try them out. Did those ingredients make the pancakes better? What could we try next time?

⒉Creativity

    True creativity is the ability to take something existing and create something new from it There are a dozen different things you can do with them. Experimenting with materials to create something new can go a long way in helping them develop their Creativity.

⒊Interpersonal Skills

    Understanding how others feel can be a challenge for kids. We know what is going on inside our own head, but what about others? Being able to read people helps kids from misreading a situation and jumping to false conclusions. “Why do you think she is crying?” “Can you tell how that man is feeling by looking at his face?” “If someone were to do that to you, how would you feel?”

⒋Self Expression

    There are many ways to express thoughts and ideas ¡ª music, acting, drawing, building, photography. You may find that your child is attracted by one more than another.

A. Encourage kids to cook with you. B. And we can't forget science education. C. We can give kids chances to think about materials in new ways. D. So how can we help our kids prepare for jobs that don't yet exist? E. Gardening is another great activity for helping kids develop this skill. F. We can do this in real life or ask questions about characters in stories. G. Being able to communicate ideas in a meaningful way is a valuable skill.

根据短文内容，从短文后的选项中选出能填入空白处的最佳选项。选项中有两项为多余选项。

How to find the perfect career

    Too many people are not satisfied with their professional career (事业) and are “stuck” in situations that do not make them happy. Here are some wonderful actions you can take to begin the path to a truly happy career.

Talk to your friends.

    Ask them, “what do you think I am best at”, or “what do you think I enjoy doing most”. However, their advice may help you decide what you should do.

    Read some interesting magazines, books, newspapers or novels. They will give you a constant flow of ideas and keep the mind rich.

Talk to the happiest and most successful people you know.

    Be serious with your questions. And see if there is anything you can learn from them. Have these people become your teachers and friends.

Keep a journal（日记）.

    Writing down your ideas is an important practice for your career growth. You never know when great ideas will come to your mind!

Develop patience.

    You may want a change in your career right now. Anyway, doing the practices mentioned above will bring about the right chance much faster.

A. Read as widely as possible. B. This may seem like a strange conversation at first. C. Ask them how they realized their dreams. D. Changing careers can be very difficult. E. Talk to your family members. F. But it is necessary to be patient and wait for the right chance to come. G. Carrying a notebook with you at all times is also a great idea.