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    1、河北省21届高二年级10月份"
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    "q":"河北省21届高二"
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    "q":"21届河北省高二年级期中考试"
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    "q":"河北省2024高二期末考试试卷答案"
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    "q":"21届河北省高二年级11月份期中考试数学"
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    "q":"河北省21届高二10月联考试卷"
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6、河北省2025-2026学年上学期高二第三次月考(MF-CL-24A3)数学试题


4、河北省2025-2026学年上学期高二第三次月考(MF-CL-24A3)数学试题


The _________________ if this city has increased from 1.7 million five years ago to 2.1 million now.
I like travelling because I can meet some ________________ (interest) people and things along the way.
Lucy’s junior middle school made a big________________ (different)to her life.
The modern building is 200 _______________(meter) high.
Gardening gives my uncle much________________ (please).
We often _____________ interesting books with each other.
After talking with his parents, Tom felt as _____________(happy) as before.


M: Yes. At first the scientist can control the robot. But after a while, the robot stops listening to the scientist’s demands. The scientist can’t control it anymore! The robot just does whatever it wants.
W: OK. Don’t tell me more, Sam.
M: You’ll enjoy it. Near the end of the movie, the robot becomes dangerous. It goes into people’s computers and eats all their information. And so …
W: Stop, Sam! I didn’t ask you for the exact details of the whole movie! I just wanted an idea.
(Text 10)
Welcome to today’s club meeting on effective leadership! I’m Jenny, from the College of Management. I’m excited to explore the different styles of leadership with you all. There are three main styles of leadership. First, as a leader, you want everyone to be part of the team. When you make a decision, you ask people in the team for their opinions first. This helps you make a good decision and people know that you trust them. Next, you give another person responsibility. If there is a job to do, you give it to a member of the team. This gives the team member confidence and they can learn about making decisions and taking responsibility. In the last style, you make all the decisions. If anyone disagrees, they are in trouble. Everyone listens to you and does what you say.
The advantage of this is that everyone knows what’s happening. The disadvantage is that your decisions may be unpopular or wrong. However, a really good leader will use all three styles. The key to good leadership is knowing when to use each one. There are other important roles in a team which you can find on my website ...


3、河北省2025-2026学年上学期高二第三次月考(MF-CL-24A3)数学试题


4、河北省2025-2026学年上学期高二第三次月考(MF-CL-24A3)数学试题


5、河北省2025-2026学年上学期高二第三次月考(MF-CL-24A3)数学试题


6、河北省2025-2026学年上学期高二第三次月考(MF-CL-24A3)数学试题


6、河北省2025-2026学年上学期高二第三次月考(MF-CL-24A3)数学试题


3、河北省2025-2026学年上学期高二第三次月考(MF-CL-24A3)数学试题


(5)6NA或3.612×1024　7
(6)HF＞H2O＞NH3＞CH4
【解析】(1)CO2分子内含有碳氧双键，双键中一个是σ键，另一个是π键，则1 mol CO2中含有的σ键个数为2NA。(2)N2的结构式为N≡N，推知CO结构式为C≡O，含有1个σ键、2个π键；CN－结构式为[C≡N]－，HCN分子结构式为H—C≡N，HCN分子中σ键与π键均为2个。(3)反应中有4 mol N—H键断裂，即有1 mol N2H4参加反应，生成1.5 mol N2，则形成的π键有3 mol。(4)设分子式为CmHn，则6m＋n＝16，解之得m＝2，n＝4，即C2H4，结构式为。单键为σ键，双键有1个σ键和1个π键，所以一个C2H4分子中共含有5个σ键和1个π键。(5)乙醛与CO(NH2)2的结构简式分别为，，故1 mol乙醛中含有σ键6NA个，1个CO(NH2)2分子中含有7个σ键。(6)两个成键原子的电负性差别越大，它们形成共价键的极性就越大(或从非金属性强弱上来判断)。由于电负性：F＞O＞N＞C，因此四种元素与H形成的共价键的极性：F—H＞O—H＞N—H＞C—H。
14．现有四种短周期元素A、B、C、D，已知：①C、D在同一周期，A、B在同一主族；②它们可以组成化合物A2C、B2C2、DC2、D2A4等；③B的阳离子与C的阴离子的核外电子排布相同；④B2C2同A2C或DC2反应都生成气体C2，B与A2C反应生成气体A2，A2与气体C2按体积比2∶1混合后点燃发生爆炸，其产物是一种常温下常见的无色无味的液体。请回答：
(1)写出元素符号：A________、B________、C________、D________。
(2)在A2C、B2C2、DC2和D2A4中，同时含有离子键和非极性共价键的化合物的电子式为____________________；
按原子轨道重叠方式，其非极性键的类型是________。化合物DC2的结构式为________。


(1)除去合金表面的氧化膜
(2) ①④③② 使 D 和C的液面相平
(3)
(4)C
(5)（3分）
(6)偏小（3分）
【分析】锌铜合金在稀硫酸中浸泡，可以除去表面的氧化膜，铜单质还原性较弱，与稀硫酸不反应，锌与稀硫酸反应生成氢气。氢气难溶于水，进入量气管，通过测定氢气的量最终确定锌和铜的含量。


3、河北省2025-2026学年上学期高二第三次月考(MF-CL-24A3)数学答案