2023-09-05 21:52:55
周测卷二原子核外电子的运动1.D解析:能量最低原理:能量较低的轨道先被填充;泡利原理:一个轨道最多容纳两个电子,且自旋方向相反;洪特规则:当多个电子进入...
2023-09-06 03:56:55
段,电解H,0,反应为2H,0电解2H2◆十0,◆。所以反应2C2+十2H,0电解2Cu+4H十O2不可能发生,A项符合题意。9.D解析:充电时,外加电源的正极与Y相连,A项错误;放电时...
2023-09-06 12:38:54
从图中可以看出,步骤Ⅱ的活化能最大(49.0kJ一3.2kJ=45.8kJ),所以该反应的决速步骤是Ⅱ,A项错误;M一H参与了反应,最后又生成了M一H,所以M一H是反应的催化剂,B项...
2023-09-06 18:40:57
限度的,反之不能(3分)17.(1)Kc2(NH)c(N)·c(H)1分)(2)氮气与氢气反应的限度(或化学平衡常数)远大于氮气与氧气反应的限度(2分)(3)①放热②d③提高合成氨反应的化学...
2023-09-06 22:42:55
18.(13分)导电塑料是将树脂和导电物质混合,用塑料的加工方式进行加工的功能型高分子材料。一种合成导电高分子材料M的路线如下图所示:02C2H,0BCH;CH2OH-CoH2OBr...
2023-09-07 06:12:55
15.N为阿伏加德罗常数的值,下列说法正确的是A.2.4g镁中含有的质子数为NAB.1mole溶于过量稀硝酸,转移电子数为3NAC.17g氨气中含有的共用电子对数为4NaD.标准状况...
2023-09-07 17:49:02
23.常温下向25mL0.1mol/L NaOH中逐滴滴加0.2mol/LCH3COOH溶液,pH的变化曲线如图(溶液混合时体积的变化忽略不计)。下列说法正确的是pHA13025V(CH COOH溶液/mLA...
2023-09-10 09:34:57
教学金国1@©所名校单元测试示范寒之札记5.在两个容积相同的容器中,一个盛有HC1气体,另一个盛有H2和CL2的混合气体,同温同压下,两容器中的气体一定具有相同的A...
2023-11-01 05:52:33
参考答案及解析·语文·非、好坏分明。“大相径庭”形容彼此相差很远,大不22.内容:漫画中一个人正在水里呼救,一群人在岸上观相同。此处是说站在欣赏者的角度来讲...
2023-11-01 13:16:20
第五套必修第三册Units 1~3试题答案听力1~5 ABCBA 6~10 CCBBC 11~15 BAACA 16~20 BAACC阅读理解A本文介绍了四个建筑。21.A根据The Dongdaemun Design Plaza部分...
2023-11-05 04:22:55
10.下列对文中画波浪线部分的断句,正确的一项是(3分)A.何者/己欲居守/而使人主自将/以情而言/天子固已难之矣/而重违其议/是以袁盎之说/得行于其间/B.何者/己欲...
2023-11-08 17:27:38
2.根据材料内容,下列说法正确的一项是(3分) A.最近四十年来的当代书法总体上是繁荣发展的,但“展览体” 的出现和盛行,使得书法不再“如其人,如其志”。 B.书法作...
2023-11-11 00:19:43
3.根据文本二的观点,面对气候变化,人类有两种基本手段,不属于“对抗”是(3分A公元前2200年到公元前1900年发生特大干早,古埃及就此分裂,诸王则在灌置方面大·力...
2023-11-14 02:38:28
增加:在缺词处加一个漏字符号(∧),并在其下面写出该加的词。删除:把多余的词用斜线(八)划掉。修改:在错的词下划一横线,并在该词下面写出修改后的词。注...
2023-11-15 16:22:40
第二节(共15小题;每小题1.5分,满分22.5分)听下面5段对话或独白。每段对话或独白后有几个小题,从题中所给的A,B,C三个选项中选出最佳选项,并标在试卷的相应...
2023-11-16 12:22:37
(Text 5)M:Did you attend yesterday's robot exhibition?W:No,I had a swimming class,so I didn't have much time left.Did you go there?M:Yes,there were nu...
2023-11-16 13:24:57
sh per person should beordered plus two dishes for the table,all of which are shared.KEY CORNER6.试试这个食谱.1.it第2版2.successful7.对巧克力和可乐说...
2023-11-16 15:56:50
32.How did the researchers deal with the waste cooking oil?A.They broke it down.B.They threw it away directly.C.They recycled it to produce new cookin...
2023-11-16 22:52:40
皿.阅读理解(共20小题;每小题2分,满分40分)阅读下列短文,从每小题所给的A、B、C、D四个选项)62.Where can we probably find the text?中选出一个最佳选项。...
2023-11-17 00:58:42
Adventure Rocks Kids Camp.Ben broke the silence,"We have less than two weeks until registration opens,and it says the camp fills up fast."Then an idea...
2023-11-17 06:12:56
LEARNING高三基础第34期芳养浮e州KEY(2022~2023)B3上期参考范文To begin with,I'm very fond of pot plants.In10书面表达专项练习(一)(fact,all the pot plant...
2023-11-17 17:02:45
A.stopB.existrer52.A.unafraidB.anhurtproveD.function53.A.pondB.placeunemployedD.uncomfortable54.A.panicB.experiencecupboardD.companyat55.A.bigB.redC.c...
2023-11-17 21:58:59
M:Sheraton.It has summer rates starting at $161 with an indoor swimming pool that's thelargest in the area,and is within walking distance to many of t...
2023-11-18 02:10:55
32.What is mentioned about the Matterhom in Paragraph 2?A.Its sway has caused serious earthquakes.B.Some of its areas are unsuitable for travelling.33...
2023-11-18 03:13:02
67.a。考查冠词。a number of为固定搭配,表示“一些”,故填a。68.creative。考查形容词。设空处作定语,修饰ways,应用形容词,表示“创新的”,故填creative。69.t...
2023-12-02 17:22:56
M:No,actually I was just waiting for you.I have big news to tell you. W:Really?What is it? M:I have an offer to work for a company in your city today....
2024-03-29 00:46:23
1竖直方向上:y=282(1分)A、B间的距离:L=√/x2十y2(1分)解得:L-3v320m(1分)(2)物块到达B点时的速度:u。s7I分)从B到C做匀速圆周运动,可得:VB=vc在C点对物块由...
2023-09-15 17:44:53
2023-10-05 00:27:25
2023-09-15 18:55:15
2023-09-15 17:36:52
2023-10-01 00:57:09