[天舟益考]2025届全国高三联合性检测(4月)历史(L专版)试题于2025-04-22发布,目前免费查试卷答案网站已经汇总了[天舟益考]2025届全国高三联合性检测(4月)历史(L专版)试题的各科答案和试卷,更多试卷答案请关注免费查试卷答案网站。

试题答案

本文从以下几个角度介绍。

    1、2024-2024学年高三第五次联考试卷历史
    2、2024学年第一学期高三五校联考历史试题
    3、2024~2024学年高三第五次联考试卷历史

6、[天舟益考]2025届全国高三联合性检测(4月)地理(L专版)试题


5、[天舟益考]2025届全国高三联合性检测(4月)生物(L专版)试题


—_________
A.Its an eraser. B.It’s a eraser.
C.It’s my an eraser. D.It’s an eraser.
73.What's this ________ English ( )
A.from B.at C.in
74.—What are _________ in English ( )
—They're basketballs.


As the flight was 41 , a weak 94-year-old woman struggled to find her seat. She appeared 42 and had difficulty passing the narrow aisle (过道). The flight attendant noticed her 43 and was about to assist when a gentleman seated in first class caught her 44 .
With a kind smile, he asked, “Can you please put her in my seat I’ll take hers.” Without hesitation, the man 45 and accompanied the flight attendant to the back of the 46 , where the elderly woman was seated. When he offered his first class seat to her, she was deeply 47 . “Never in my 94 years has someone done that for me,” she said, her voice trembling with 48 . She gave him a big hug, tears welling up in her eyes. “Thank you, young man,” she added, 49 moved by the unexpected kindness.
The simple 50 had a ripple effect on the entire flight. The flight attendant 51 how the mood on the plane shifted as passengers witnessed the man’s act.
It was amazing how his thoughtful act changed the 52 of everyone on the flight. In a time when the world often feels overwhelming, this story is a beautiful 53 that even the smallest acts of kindness can have a profound impact. His 54 not
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only made a 94-year-old woman’s day but also left a lasting impression on everyone who
55 it.


4、[天舟益考]2025届全国高三联合性检测(4月) (L专版)试题


1、[天舟益考]2025届全国高三联合性检测(4月)数学(L专版)试题


2、[天舟益考]2025届全国高三联合性检测(4月) (L专版)试题


6、[天舟益考]2025届全国高三联合性检测(4月)语文(L专版)试题


6、[天舟益考]2025届全国高三联合性检测(4月)化学(L专版)试题


4、[天舟益考]2025届全国高三联合性检测(4月)生物学(L专版)试题


【知识点】合金与合金的性质;金属的化学性质;金属活动性顺序及其应用;置换反应及其应用
【解析】【解答】(1)合金的硬度比组成它的纯金属大,故青铜的硬度比纯铜的硬度大;
故答案为:大;
(2)铝制品之所以耐腐蚀是因为常温下,铝在空气中与氧气反应,表面生成一层致密的氧化铝薄膜,阻止内部铝进一步被氧化;
故答案为: 常温下,铝在空气中与氧气反应,表面生成一层致密的氧化铝薄膜,阻止内部铝进一步被氧化 ;
(3)将一定量的锌和金属R的混合粉末加入一定量的Cu(NO3)2溶液中,锌与硝酸铜反应生成硝酸锌和铜,根据化学方程式Zn+Cu(NO3)2=Zn(NO3)2+Cu可知,每65份质量的锌置换出64份质量的铜,反应后固体质量减小,则反应后溶液质量增加,由图示可知首先发生的反应,溶液质量是增加的,然后发生反应溶液质量是减小的,说明锌先与硝酸铜反应,然后R再与硝酸铜反应,可知Zn、Cu、R的金属活动性由强到弱的顺序为Zn>R>Cu;
②c点时,溶液质量不再改变,反应结束,R可能完全反应,也可能有剩余,滤渣可以是只有铜,或是铜和R两种物质,故组成情况有2种;


5.酒后驾车是引发交通事故的重要原因。交警对驾驶员进行呼气酒精检测的原理是橙色的酸性K2Cr2O7水溶液遇乙醇迅速生成绿色的Cr3+。下列对乙醇的描述与此测定原理有关的是(  )。
①乙醇沸点低 ②乙醇密度比水的小 
③乙醇有还原性 ④乙醇是烃的含氧衍生物
A.②④ B.②③ C.①③ D.①④
答案:C
解析:乙醇沸点低,易挥发,可以随呼吸呼出,故易被检测。K2Cr2O7具有强氧化性,可以氧化乙醇,自身被还原成Cr3+,说明乙醇具有还原性。
5.酒的主要成分是一种常见的有机物乙醇。


3、[天舟益考]2025届全国高三联合性检测(4月)化学(L专版)答案