2023-11-01 03:27:02

1.B漂白粉具有强氧化性，可以消毒、杀菌，A正确；N,CO,碱性较强，不能作治疗胃酸的试剂，B错误；二氧化碳灭火器产生的CO,会与钠燃烧生成的N,O,反应，产生氧气并...

2023-11-08 11:27:30

23:02■%●0■8四49！令【高一】金太阳512A|2…●●●←河北省保定市2022-2023学年高一下学期…二、非选择题：本题共4小题，共58分。15.(14分)非金属元素氮的单质及其化合...

2023-11-08 16:04:29

In the late 1930s,a collection of 14 gold Roman coins,known as the Chapipitreasure,was also found in the same woodlands.The researchers believe that l...

2023-11-09 16:12:37

2022年哈三中第一次高考模拟考试7.Where would the man like to go for his vacation?A.Stonehenge.B.The Great WallC.The Statue of Liberty.英语试题听第7段材...

2023-11-10 16:15:07

较大17.N,O和C0是环境污染性气体，可在Pt,O表面转化为无害气体，有关化学反应的物质变化过程及能量变化过程分别如图甲、乙所示。下列说法不正确的是(能N,OPt,O"C...

2023-11-11 04:23:03

14.S2Cl2常用作橡胶的硫化剂，能改变生橡胶遇冷变硬的性质。S2C2各原子最外层均达到8电子稳定结构，极易与水反应生成淡黄色沉淀和能使品红溶液褪色的气体。下列...

2023-11-11 06:33:31

咸阳市2022~2023学年度第二学期期末教学质量调研检测高二化学试题参考答案及评分标准一、选择题（本大题共14小题，每小题3分，计42分。每小题只有一个选项是符合...

2023-11-11 14:36:45

Earlier this year,China launched a three-person crew for a six-month mission aboard its space station.The mission aimed to set 56 new record for the l...

2023-11-11 19:56:52

better than,most people.company and what their goals are.Those can often guide you50.A.breakB.partyC.testD.show增加：在缺词处加一个漏字符号（∧），并在...

2023-11-12 03:27:06

第1章化学物质及其变化学生用书3.注意特定情况下的隐含因素宏观4,注意关键词“可能”还是“一定”宏辨识与微观探析素养水平3、4要求。观辨识与微观探析素养水平3、4...

2023-11-13 09:21:00

续性产生了影响，并且它确实创建了一个每个人都可以分享自己的服装的社区。由此可推断出，Tynon认词江积累飞uby可持线性加得汉：2.If we think of nture as mthi...

2023-11-13 13:33:35

大一轮复习学案化学2.电极反应式的书写步骤直流电源判断电解池的阴、阳极，与直流电源负极相连的为阴极，与直流电源正极相连的为阳极RCH,NH,看清电解池的阳极材...

2023-11-13 15:45:10

大一轮复习学案化学HOOC OCHHOOC浓H,S0浓HNO,A浓硫酸/△HO.SHOOCH,A.1mol该物质与足量NaHC0,溶液反应可放出H,3 mol CO2HO,SHO,SNHB.1mol该有机物最多可与含4 mol...

2023-11-13 16:04:49

Tanya Aflenl a passer-by.who.es in the sea.52 A.slecpD.rememwas able to get him toe baby CPR and.A.imaginedMr Reeder eengittle bit of breathaloneDptim...

2023-11-14 21:43:20

6.下列指定反应的离子方程式正确的是A.铜丝插入热的浓硫酸中：Cu+2H=Cu2*+H2↑B.将NO2通入NaOH溶液中：2NO2+2OH=NO+NO,+H,OC、向HO2溶液中滴加少量FeC13:2Fe+H,O,...

2023-11-16 15:10:54

weak-tie relationships in lockdown We can also make more weak-tie-style conversations withour strong ties可知，作者建议，居家隔离期间，人们可以和平时...

2023-11-16 20:50:47

试卷类型：A2023年汕头市普通高考第一次模拟考试英语本试卷共8页，满分120分。考试用时120分。注意事项：1.答题前，考生务必将白己的姓名、考生号、考场号和座位...

2023-11-17 08:10:59

D.Keeping the bullying a secret is what the bully wants.EFurthermore,therespnt in tkingopenbou bu.But doing nothing inretunbullC.Howevering u voice or...

2023-11-17 18:24:44

.t8Ge8uEG8v猛Ⅱ.根据2d对话内容，完成下面的短文，每空一词。Today the(1)weather is great.Steve is having a芳美在报社good(2)time at the park.He is playing...

2023-11-18 11:22:51

听第9段材料，回答第14至17题。14.Why does the woman give up Ridgeway House?A.It has no single room.B.It doesn't provide meals.C.It is closed in the sum...

2023-11-18 15:26:54

第二部分阅读（共两节，满分50分）第一节（共15小题；每小题25分，满分37.5分）阅读下列短文，从每题所给的A、B、C、D四个选项中选出景佳选项。AWith he ew seme...

2023-11-18 15:54:46

团GLOBAL ENGLiS团第二节听第6段材料，回答第6、7题。④6.What does the woman want to do?若美径报社A.Get off the plane.Take another seat.EARNING ENGLISHC.G...

2023-11-19 12:23:02

C.formerD.regular47.A.youngB officialB.presentedC.announcedD.shared48.A.introducedB.parentsC.friend'sD.husband's49.A.father's50.A.mentalB.painfulC.thi...

2023-11-21 09:21:41

B.△H2<△H31一容林C.△H1=△H3-△H2D.平衡后，只将反应③体系的体积压缩，则K3增大6.下列实验不能达到目的的是稀硫酸KC1固体2mL5%02mL5%等浓度的稀盐酸的稀盐酸号涂风...

2023-11-22 00:27:25

B.Creative and generous.《关键能力·素养整合》C.Wild and hard-working.Ⅳ.阅读理解D.Pioneering and humorous.V.完形填空At 1:43 a.m,Bertozzi was awakened b...

2023-11-22 02:43:02

31.D。理解主旨要义。根据最后一段中的people should always be careful when doing Baduanjin,and people who are weak and easy to fall should not take up t...

2023-11-23 06:27:20

②制备HS时所用原料为13.2gFS(其他原料均过量)，最终制得硫脲③为了使氨气和氯气在装置D中充分混合，请确定上述装置的合理连接顺序：a→d→c→一hgj-i-b(提示：氨气和...

2023-11-23 09:45:22

比B0,AkDH =Nal+l0H3DH3p02H3B03Ot0H二a BcoH404一)HiB0sHtr三二为一天)园统封彩投应制作印刷电路(4)已知HP02与过量NaOH反应生成板。其制作原理可用2FeCl,+CuNaH...

2023-11-24 03:21:13

答案选D。二、非选择题15.(12分)【答案】Fe、Cu2Fe2*+C12=2Fe3+2C1KSCN溶液变红色NaOH.A13*+40H=A102+2H20红色油漆或涂料等【解析】(1)根据分析，固体A的成分是F...

2023-11-29 00:35:10

1.化学与科技、社会、生产密切相关，下列有关说选不正确的是、y乙醇汽油的广泛使用不能减少汽车尾气中O,的排放B.“神舟十三号”逃逸系统复合材料中的酚醛树脂属于...