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试题答案

本文从以下几个角度介绍。

    1、辽宁省高中物理
    2、辽宁 高二上学期 期初考试 物理
    3、辽宁省部分重点中学协作体2024物理
    4、2024-2024辽宁省重点高中协作校高二上学期期末考试
    5、辽宁省高中物理几本书
    6、辽宁高中物理是什么版本
    7、辽宁高中物理教材2024
    8、辽宁省部分重点高中2024-2024
    9、辽宁高中物理目录
    10、辽宁省高中物理教材目录

6、辽西重点高中2025-2026学年度上学期高二开学考试历史试题


2、辽西重点高中2025-2026学年度上学期高二开学考试历史试题


B.He has three.
C.He has four.
)24.A.The big one.
B.The small one
C.The two beds
)25.A.On the second floor
B.On the third floor


（2025八下·广州期末） 阅读理解
The guitar is one of the most popular musical instruments in the world. Many different cultures have played instruments like the guitar for over 3，000 years. The oldest instrument that we can see today comes from Ancient Egypt. You can see this guitar in a museum in Cairo. It belonged to a singer who sang for the Egyptian queen Hatshepsut. This type of guitar had a long neck and only three strings（弦）.
The lute is also an ancient instrument similar to a guitar，but it has a short neck and a body like half a pear. It usually had more strings than a guitar and they were in pairs. From 1100 to 1500，travelling singers and story tellers played the lute to go with their songs.
Guitars sometimes had pairs of strings like the lute，but the guitar changed over time to use single strings. People used guitars with six single strings for the first time in the 1600s in Italy，but the most important change happened in the 1850s. The Spanish guitar maker Antonio Torres Jurado made the guitar's body bigger. His idea made the sound of the guitar louder and better. Most of today's classical guitars follow his design.
The first electric guitars appeared in the 1930s. The electric guitars have a solid body and can make many different sounds. We also find them in many different shapes and sizes. Some electric guitars don't look like guitars at all!
29．Which of the following is a lute
A． B．


3、辽西重点高中2025-2026学年度上学期高二开学 化学答案


5、辽西重点高中2025-2026学年度上学期高二开学考试生物答案


5、辽西重点高中2025-2026学年度上学期高二开学考试 答案


4、辽西重点高中2025-2026学年度上学期高二开学考试生物学答案


6、辽西重点高中2025-2026学年度上学期高二开学考试英语试题


3、辽西重点高中2025-2026学年度上学期高二开学考试历史答案


3．（2025·上海·一模）某研究小组为了更准确检测香菇中添加剂亚硫酸盐的含量，设计实验如下：
①三颈烧瓶中加入10.00g香菇样品和400mL水；锥形瓶中加入125mL水、1mL淀粉溶液，并预加0.30mL0.01000mol/L的碘标准溶液，搅拌。
②以0.2L/min-1流速通氮气，再加入过量磷酸，加热并保持微沸，同时用碘标准溶液滴定，至终点时滴定消耗了1.00mL碘标准溶液。
③做空白实验，消耗了0.10mL碘标准溶液。
④用适量Na2SO3替代香菇样品，重复上述步骤，测得SO2的平均回收率为95%。
回答下列问题：
(5)该样品中亚硫酸盐含量为 mg/kg(以SO2计，结果保留小数点后一位，写出计算过程)。


(2)三个方案都可测出镁的质量分数。
命题热点(二)
1．选B　由“红褐色固体”可知F是Fe(OH)3，从而得出A为Fe，“黑色晶体”B为Fe3O4，继而推出C为FeCl2，D为FeCl3，E为Fe(OH)2，故A错误；亚铁离子为浅绿色，铁离子为棕黄色，故B正确；⑤的离子方程式为Fe＋2Fe3＋===3Fe2＋，故C错误；④的离子方程式为2Fe2＋＋Cl2===2Fe3＋＋2Cl－，故D错误。
2．选B　废液中含有Fe3＋、Cu2＋、Ag＋三种金属离子，加入过量的铁粉后，Fe3＋被还原为Fe2＋，Cu2＋被还原成金属铜，Ag＋被还原生成银，所以沉淀A中含有金属铜、银和过量的铁，A项错误；溶液B中含有的金属阳离子为Fe3＋，因为Fe3＋遇SCN－发生反应Fe3＋＋3SCN－===Fe(SCN)3，溶液呈红色，所以检验溶液B中含有的金属阳离子常用的试剂是KSCN溶液，B项正确；溶液A含Fe2＋，加入碱生成氢氧化亚铁，氢氧化亚铁不稳定，易被氧化生成氢氧化铁，C项错误；操作②加入过氧化氢，将亚铁离子氧化为Fe3＋，不需要漏斗，D项错误。
3．(1)过滤　(2)H2　(3)HCl　还原剂　
(4)[Al(OH)4]－　Fe2＋　
(5)2Al＋2OH－＋6H2O===2[Al(OH)4]－＋3H2↑　Fe＋2H＋===Fe2＋＋H2↑(共96张PPT)


3、辽西重点高中2025-2026学年度上学期高二开学考试化学答案