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试题答案

本文从以下几个角度介绍。

    1、榆林市2024~2024年度高三第三次模拟考试
    2、2024榆林市高三三模
    3、2024榆林三模理科数学
    4、榆林市二模2024
    5、2024陕西省榆林市高三二模
    6、榆林市高三第二次模拟考试答案
    7、2024榆林市高三二模成绩
    8、榆林市2024~2024年度高三第四次模拟考试
    9、2024榆林市高考二模成绩
    10、2024榆林二模

2、[榆林三模]榆林市2025届高三第三次模拟检测数学试题


6、[榆林三模]榆林市2025届高三第三次模拟检测数学试题


特殊的；特别的__________
展览__________
节日__________
游戏__________
滚动__________
听起来好像__________
可爱的__________


D．It’s difficult for Jack and Lauran to get followers online.
A survey in an American middle school reveals interesting opinions about how people view life. Scientists showed two hundred students half a glass of water. They asked students if it was half-full or half-empty. Seventy percent saw it as half-full, while thirty percent saw it as half-empty. This reflects two different attitudes (态度) towards life: positive attitude and negative attitude.
People who see the glass as half-full, like Mike, tend to look on the bright side of life. For example, when Mike missed his school bus, he saw it as a chance to exercise and even sang a song to say sorry for being late. He enjoyed his morning.
On the other hand, those who see the glass as half-empty, like Kate, often expect bad things to happen. When Kate missed her school bus, she felt upset (紧张的) about running to school. Her legs hurt and she also missed the presentation. She called it a bad day.
This survey reminds us that it’s important to choose to see the glass as half-full. Life isn’t always easy, but by focusing on the positive, we can have a better mindset and experience more joy. So, let’s follow Mike’s example and try to be more positive in our daily lives.
21．What did scientists show to two hundred students in the survey
A．A full glass of water. B．Half a glass of water.


4、[榆林三模]榆林市2025届高三第三次模拟检测数学答案


2、[榆林三模]榆林市2025届高三第三次模拟检测数学答案


4、[榆林三模]榆林市2025届高三第三次模拟检测数学答案


3、[榆林三模]榆林市2025届高三第三次模拟检测数学答案


2、[榆林三模]榆林市2025届高三第三次模拟检测数学试题


4、[榆林三模]榆林市2025届高三第三次模拟检测数学答案


（1）实验室制取CO2的化学方程式：　CaCO3＋2HClCaCl2＋H2O＋CO2↑　。
（2）制取二氧化碳的发生和收集装置为　BC　（填字母）。
（3）干燥CO2气体，从E中的　a　口通入。
（4）模拟海洋生态系统
①绿色植物在生态箱中通过呼吸作用和　光合　作用参与碳循环。
②俊宇向生态箱中通入CO2，一段时间后烧杯中出现的现象为　澄清石灰水变浑浊　。
③测得生态箱内pH下降，其原因是　CO2 与水反应生成碳酸　。


已知：“还原”时，发生反应FeS2＋14Fe3+＋8H2O===2SO＋15Fe2+＋16H＋；FeS2与H2SO4不反应。
下列有关说法不正确的是(　　)
A. “酸溶”时适当提高硫酸浓度可加快反应速率
B. “还原”时氧化产物与还原产物的物质的量之比为2∶15
C. “过滤Ⅰ”所得滤液中存在的阳离子主要有Fe2+和H＋
D. “沉降、氧化”时发生的离子方程式：4Fe2+＋8NH3·H2O＋O2===8NH＋4FeOOH↓＋2H2O
8. （2024南通中学期中）在氩气气氛下，向KOH溶液中逐滴加入一定量的FeCl2溶液并持续搅拌，100 ℃下回流3 h，得到成分为Fe和Fe3O4的黑色沉淀。将其过滤分离后，依次用沸水和乙醇洗涤，干燥后焙烧3 h可得Fe/Fe3O4复合物产品。实验室制备Fe/Fe3O4复合物的部分装置如图所示。下列有关说法不正确的是(　　)


3、[榆林三模]榆林市2025届高三第三次模拟检测数学答案