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2、2025届 青桐鸣大联考(高三)(4月)数学试题


4、2025届 青桐鸣大联考(高三)(4月)数学试题


11．A．way B．choice C．hope D．chance
12．A．when B．before C．after D．until
13．A．blood B．strength C．energy D．courage
14．A．across B．through C．past D．against
15．A．cared B．looked C．nursed D．cured
（8）（2024·浙江绍兴·二模）I was born in a poor community on the north side of Boston, US. 1 with a single mother who was always in poor health, I lived each day on food stamps (食物券) and studied in that was called “the 2 public school area”. Not many people expected much of me, so I had to expect something of 3 .
On my 13th birthday, I bought a 4 of Harvard to hang in my room. Being at Harvard became what I dreamed about. Even when my electricity was cut off and I 5 at 5:30 a.m. in darkness and got myself ready for study, I knew that my poster of Harvard was 6 hanging only two feet away from me.


● Maximum number per group: 15 persons. You can also book a tour for fewer people, but the price remains the same.
● Price: ?105 per group, excluding entry.
● Dates and times: check the booking system for the latest availability.
● Duration: 50 minutes.
● Language: Dutch or English.
Please book your private tour at least five days prior to your visit.
Guided tours


3、2025届 青桐鸣大联考(高三)(4月)数学试题


5、2025届 青桐鸣大联考(高三)(4月)数学试题


2、2025届 青桐鸣大联考(高三)(4月)数学试题


5、2025届 青桐鸣大联考(高三)(4月)数学试题


2、2025届 青桐鸣大联考(高三)(4月)数学试题


3、2025届 青桐鸣大联考(高三)(4月)数学试题


D.实验结束后，能观察到尖嘴导管口棉花变黑
10.2，6—二溴吡啶是合成阿伐斯汀的中间体，实验室制备2，6—二溴吡啶的步骤如下：
步骤1：在三颈烧瓶中加入2，6—二氯吡啶、冰醋酸，搅拌溶解后，在110℃下，通入HBr。
步骤2：反应完毕，冷却至室温，析出晶体，过滤。
步骤3：利用如图装置回收乙酸。母液回收溶剂后，冷却，析出晶体，过滤，合并两次晶体，在空气中干燥。
已知：乙酸、2，6—二氯吡啶、2，6—二溴吡啶的沸点依次为117.9℃、206℃、249℃；油浴温度为100～250℃；沙浴温度为220～350℃。下列叙述错误的是( )
A.步骤1采用“油浴”加热三颈烧瓶


请回答：
（1）组成X的四种元素是N、H和 （填元素符号），X的化学式是 。
（2）溶液B通入过量得到白色沉淀C的离子方程式是 。
（3）写出一个化合反应（用化学方程式或离子方程式表示） 。
要求同时满足：
①其中一种反应物的组成元素必须是X中除N、H外的两种元素；
②反应原理与“”相同。


3、2025届 青桐鸣大联考(高三)(4月)数学答案