华师联盟2025届高三第二学期5月质量检测历史B试题于2025-05-23发布,目前免费查试卷答案网站已经汇总了华师联盟2025届高三第二学期5月质量检测历史B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。

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4、华师联盟2025届高三第二学期5月质量检测地理B试题


4、华师联盟2025届高三第二学期5月质量检测生物B试题


An amazing change is happening in the Kubuqi Desert. During the cold winters, farmers are busy 21.   sand-control work. The main task is to repair straw checker-boards(草方格).The straw checker-boards 22.   (build) by farmers to hold the moving sand. Zhang Yong 23.   experienced farmer says," We use these straw checker-boards every year  24.   (Keep) the land safe from the sand."
The Kubuqi Desert was known as at dead land". Since the 1950s, with the hard work of local people, things have changed 25.   (great). The yellow sand has gradually turned into green fields. Herdsman Wangjil, who is 26.   (old) than most of his neighbours, is very proud to see the changes. The key to success lies in mixing new tools with traditional  27.   (mimed). Wangjil often thinks about the question, " 28.  can we stay together with deserts "" His answer is "by understanding 29.   (they) ways". It shows that deserts don't have to be people's enemies. Instead, they can live with, deserts in a friendly way. Although it is a long-term job, people are still full of hope 30.   they will continue sand-control work in the following years.
(2025·洞头模拟)阅读下面短文,在空白处填入一个适当的词,或填入括号中所给单词的正确形式。
One summer evening, Sally and John sat on the grass, watching the sky.
"Look at the stars! They are twinkling (闪烁) !  31.   do they shine like that " Sally asked.
"When starlight comes through the air around the earth, the air moves and changes the light's path. It makes stars look like they' re dancing!" John  32.   (smile).
"How do you know that "


【21~25题答案】
【答案】21. T 22. F
23. F 24. F
25. T
第二节(共15小题;每小题1分,满分15分)
根据短文内容,从题中所给的A、B、C、D四个选项中选出最佳选项。
A


2、华师联盟2025届高三第二学期5月质量检测化学B试题


6、华师联盟2025届高三第二学期5月质量检测化学B试题


1、华师联盟2025届高三第二学期5月质量检测生物学B试题


2、华师联盟2025届高三第二学期5月质量检测化学B试题


4、华师联盟2025届高三第二学期5月质量检测数学B试题


2、华师联盟2025届高三第二学期5月质量检测语文B试题


(填“元素”“原子”或“单质”),占海水所溶解
物质总质量的99.8%以上,从中可以提取50多种化学物质。
(2)海洋动力资源:潮汐能是一种清洁、不影响生态平衡的
(填“不可再生”或“可
再生”)资源。潮汐能发电实现了机械能向电能的转化。
活动二:了解海水淡化
【查阅资料】同学们了解到目前海水淡化的主流方法有多级闪急蒸馏法和反渗透技术(膜法)。


(2)7
(3)乙酸 丙酮
(4)
(5) ab
【分析】A为CH2=CH2,与HBr发生加成反应生成B(CH3CH2Br),B与Mg在无水乙醚中发生生成C(CH3CH2MgBr),C与CH3COCH3反应生成D(),D在氧化铝催化下发生消去反应生成E(),E和碱性高锰酸钾反应生成F(),参考D~E反应,F在氧化铝催化下发生消去反应生成G(),G与反应加成反应生成二酮H,据此分析解答。
【解析】(1)A为CH2=CH2,与HBr发生加成反应生成B(CH3CH2Br),乙烯的π键断裂,故答案为:π;
(2)D为,分子式为C5H12O,含有羟基的同分异构体分别为:共8种,除去D自身,还有7种同分异构体,其中核磁共振氢谱有三组峰,峰面积之比为的结构简式为,故答案为:7;;


3、华师联盟2025届高三第二学期5月质量检测化学B答案