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试题答案

本文从以下几个角度介绍。

    [文海大联考]2026届h20高三起点考试化学试题

4、[文海大联考]2026届H20高三起点考试政治试题


5、[文海大联考]2026届H20高三起点考试化学试题


短文1
Hello, everyone! My name is Lisa. I'm a student in Grade 7. My favourite subject _______ (be) English. I _______ (like) it because my English teacher, Ms. Green, _______ (be) very kind. She _______ (teach) us many useful things. We _______ (have) English class from Monday to Friday.
My friend Tom _______ (not like) English. His favourite subject _______ (be) P.E. He _______ (think) P.E. is exciting. We often _______ (play) basketball in P.E. class.
What _______ (be) your favourite subject Can you _______ (tell) me
短文2
Today is Wednesday. I _______ (have) many classes. The first class _______ (be) math. I _______ (not like) math because it's difficult. Then I _______ (have) Chinese. My Chinese teacher _______ (be) Mr. Wang. He _______ (tell) us many interesting stories.
In the afternoon, I _______ (have) music class. Music _______ (be) my favourite subject. I _______ (love) singing and dancing. The music class _______ (finish) at 4:00 p.m. Then I go home.


25．推理判断题。根据There was a very mean man named Mr. Black…He was so impolite to his neighbors…He always complained (抱怨) about all his neighbors…可知，布莱克对邻居非常不友好，他从不和任何人打招呼，他总是抱怨他的邻居和他们制造的噪音，所以推知布莱克非常不友好。故选B。
26．细节理解题。根据In its place, he found a note from David."及"Good morning, Mr. Black. I saw your rubbish here, and since I was on my way out, I picked it up for you.可知，纸条是大卫写的，大卫看到了布莱克的垃圾，于是帮布莱克拿走了垃圾。故选C。
27．词义猜测题。根据下文He began thinking about the terrible traffic he would surely have to deal with on his way to work.可知，布莱克看到大卫留的纸条，知道是大卫帮自己拿走了垃圾，但是他并为此作出感谢，而是考虑上班路上的交通情况。划线部分单词意为"忽视"，即布莱克将大卫的善举置之不理。故选A。
28．推理判断题。根据Mr. Black was very glad that they treated him nicely.…He realized that he should try to do the same with the people he met.可知，布莱克很高兴邻居对他的友好对待，他意识到他应该像他们一样对待他遇到的人。故选B。
五、C篇
（2024·聊城）At the beginning of the school year, each student would be given a special job for which they would be responsible (负责任的) for the whole term. Rita, a quiet and hardworking girl, hoped for an exciting task, like taking care of the class plants. Instead, she received a small box with sand and a small ant.
Even though the teacher explained that this task was very special, Rita could not help feeling disappointed. However, she decided to do her best with her new job. She began to study and care for the ant, learning about its habitat (栖息地) and needs. She made the box a comfortable home for the ant, and it grew much bigger than anyone expected.


2、[文海大联考]2026届H20高三起点 历史试题


5、[文海大联考]2026届H20高三起点考试化学试题


5、[文海大联考]2026届H20高三起点考试政治试题


5、[文海大联考]2026届H20高三起点考试物理试题


4、[文海大联考]2026届H20高三起点考试语文试题


2、[文海大联考]2026届H20高三起点考试 试题


9. A　丁醇与乙醚的沸点相差较大，可选择蒸馏法除去丁醇中的乙醚，A正确；乙醇和水互溶，不能用乙醇萃取碘水中的碘，B错误；乙醇和水互溶，不能用分液法分离水和乙醇，C错误；KNO3在水中的溶解度随温度升高变化幅度很大，NaCl在水中的溶解度随温度升高变化幅度很小，一定温度范围内，二者溶解度差异较大，故可通过重结晶法分离KNO3和NaCl，D错误。
10. (1) D　(2) C　(3) A　(4) F　(5) E
11. D　2KClO32KCl＋3O2↑，混合加热后，剩余KCl、MnO2固体，KCl易溶于水，MnO2不易溶于水，故对混合物进行分离的过程，先溶解，经过过滤后MnO2被分离，水洗MnO2，干燥得到MnO2，滤液为KCl 溶液，经过蒸发结晶得到固体，D正确。
12. D　破碎的目的是增大青蒿与乙醚的接触面积，A正确；操作Ⅰ是过滤，需要用到的玻璃仪器有漏斗、玻璃棒、烧杯，B正确；操作Ⅱ是蒸馏，利用了乙醚与青蒿素的沸点相差较大，C正确；青蒿素易溶于有机溶剂，几乎不溶于水，所以不能用水溶解，D错误。
13. D　根据流程图可知，溶解过程中Zn和Cu都被溶解，Zn可直接被稀硫酸溶解，而Cu不能溶于稀硫酸，故加入的H2O2作用是氧化Cu而使Cu溶解，A正确；为了保证操作M之后铜被完全分离，故加入过量锌粉的目的是将Cu2+转化为Cu单质，B正确；操作M是过滤，用到的玻璃仪器有烧杯、漏斗和玻璃棒，C正确；通过加适量碱、过滤、洗涤、干燥操作可得到Zn(OH)2，灼烧可将Zn(OH)2转化为ZnO，D错误。
14. (1) D　(2) 过滤
(3) H2SO4　Fe＋H2SO4===FeSO4＋H2↑


【知识点】常见金属元素的单质及其化合物的综合应用；探究物质的组成或测量物质的含量；制备实验方案的设计
【解析】【解答】（1）As的原子序数为33，则核外电子数为33，简化电子排布式为[Ar]3d104s24p3；元素的非金属性越强，最高价含氧酸酸性越强，非金属性从：Cl>P>As，则As、P、Cl三种元素最高价含氧酸酸性从大到小的顺序为HClO4>H3PO4>H3AsO4；
（2）由分析可知，“滤渣1”的主要成分是SbOCl，将滤渣1用氨水浸取使SbOCl转化为Sb2O3，SbOCl和NH3 H2O反应生成Sb2O3、NH4Cl和H2O，化学方程式为：；
（3） ，当 时， ，此时 ，Qc（4）①已知 分子结构中含 1 个-OH，次磷酸为一元中强酸，NaH2PO2属于正盐；H3PO4中磷原子的价层电子对数为4+=4，采用sp3杂化；
②“除砷”过程中AsCl3和NaH2PO2反应生成As，NaH2PO2的氧化产物为H3PO4，P元素化合价升高，As元素化合价降低，则反应的离子方程式为：；
（5）的摩尔质量为299g/mol，假设有299g含有1mol的Sb，质量为122g，高温分解剩余固体为氧化物的质量为299g×51.5%≈154g，氧元素的质量为154g-122g=32g，n(Sb)：n(O)=1：=1：2，剩余氧化物的化学式为SbO2。


3、[文海大联考]2026届H20高三起点考试生物答案