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试题答案

本文从以下几个角度介绍。

    2026届[文海大联考]g20高三起点考试地理答案

5、2026届[文海大联考]G20高三起点考试地理试题


3、2026届[文海大联考]G20高三起点考试化学试题


A. How much B. How many C. How often D. How far
Ⅱ. 完形填空(阅读下面短文,从各题所给的A、B、C和D项中选出最佳选项)
Everybody needs friends. You may feel sad and 1________ if you don't have someone to play with or 2________ with. Here are some ideas to help you in 3________ friends and keeping friends.
When we want to make friends with someone, 4________ at him or her is the best way. People like to see smiles. They are the most beautiful expression in the 5________. When you smile, you can 6________ happiness to them.
Many people think friends should share worries, so they like talking with their friends about their 7________. But don't forget you should do the same. Listening is very 8________ in friendship keeping. Listen carefully to 9________ people are saying and respond in a right way. Body language can also show that you're listening.
If you want to have a lot of friends, be a 10________ person first!
1. A. free B. happy C. tired D. lonely


( )24. What does Helen have for breakfast on Tuesday
A. Noodles. B. Porridge. C. Cakes.
( )25. What is Helen’s favorite food
A. Cakes. B. Beef. C. Tomato soup.
第四节 听短文填空(共5题;每题1分,满分5分)
Grandfather’s Living Habits
Age 60 years old


3、2026届[文海大联考]G20高三起点 历史答案


3、2026届[文海大联考]G20高三起点考试历史答案


2、2026届[文海大联考]G20高三起点考试英语答案


3、2026届[文海大联考]G20高三起点考试政治答案


5、2026届[文海大联考]G20高三起点考试地理试题


3、2026届[文海大联考]G20高三起点考试历史答案


(5)氯化铍熔融盐电解法也可以制备铍,但在电解过程中需要加入一定量 NaCl,加入
NaCl 的作用是 。
(6)该流程中能循环使用的物质有 HF、NH3 和 (填化学式)。
18.(13分) 某化学小组同学利用一定浓度的 H2O2 溶液制备 O2,再用 O2、乙醇和乙
酸进行相关实验。
Ⅰ.制备 O2 该小组同学设计了如下气体发生装置(夹持装置省
略)


[题点多维训练]
1.B
2.选D “采蒿蓼之属,晒干烧灰”,说明“石碱”成分来自植物烧成的灰中的成分,“以水淋汁”,该成分易溶于水,久则凝淀如石,浣衣发面,亦去垢发面,能作为发酵剂、能去油污,植物烧成的灰中的成分主要为碳酸钾,即“石碱”为碳酸钾,据此分析。“石碱”为碳酸钾,属于离子化合物,含有离子键,故A、C正确;“石碱”为碳酸钾,含有极性共价键,不含有非极性共价键,故B正确,D错误。
3.(1)①⑤ ②③ ④ ⑥
(2)离子键、(极性)共价键
(3)范德华力 氢键和范德华力
4.解析:(1)氮元素的原子序数为7,位于元素周期表第2周期ⅤA族;


3、2026届[文海大联考]G20高三起点考试生物答案