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5、文海大联考·2026届G20高三起点考试数学试题


4、文海大联考·2026届G20高三起点考试生物试题


C: OK. Let me s 9 first. It was summer. It was very hot.
D: The ant worked h 10 . He carried food home.
E: The grasshopper saw this. He l 11 at the ant.
F: W 12 came. It was windy and cold.
G: The ant stayed in his warm home. He h 13 a lot of food.
H: But the grasshopper d 14 have any food at home. He was cold and h 15 .
A: You’re all great!


28. What’s the article mainly about
A. How students make their uniforms beautiful. B. When students have to wear uniforms.
C. Why students have to wear uniforms. D. What students think of wearing uniforms.
B
Once there were two mice. They were friends. One mouse lived in the country (乡下), and the other mouse lived in the city.
One day the Country mouse saw the City mouse. He said, “Come and see me at my house in the country.” So the City mouse went. The City mouse said, “This food is not good, and your house is not good. Why do you live in a hole (洞) in the field If you live in the city, you would live in a nice house made of stones (石头). You would have nice food to eat. You must come and see me at my house in the city.”
The Country mouse went to the house of the City mouse. It was a very good house. Nice food was ready for them to eat. But just as they began to eat, they heard a great noise. The City mouse cried, “Run! Run! The cat is coming!” They ran away quickly and hid (隐藏).


5、文海大联考·2026届G20高三起点 物理试题


1、文海大联考·2026届G20高三起点考试语文试题


2、文海大联考·2026届G20高三起点考试地理试题


4、文海大联考·2026届G20高三起点考试数学试题


5、文海大联考·2026届G20高三起点考试物理试题


5、文海大联考·2026届G20高三起点考试化学试题


二、填空题。
19、用下面两种方法可以制得白色的沉淀。
Ⅰ．方法一：用溶液与不含的蒸馏水配制的NaOH溶液反应制备。
（1）除去蒸馏水中溶解的常采用的________方法。
（2）生成白色沉淀的操作是用长胶头滴管吸取不含的NaOH溶液，插入溶液液面下，再挤出NaOH溶液。这样操作的理由是________________。
Ⅱ．方法二：在如图所示装置中，用不含的NaOH溶液、铁屑、稀制备。
（1）在试管A中加入的试剂是________________。


(3)导致铝盒中白磷燃烧的原因是 。
(4)结合实验探究及图像变化分析合理的是
A．时蜡烛燃烧消耗氧气，含量减少，生成二氧化碳，含量增加
B．时蜡烛熄灭，说明瓶内氧气被消耗完
C．二氧化碳含量升高是因为白磷燃烧，继续消耗瓶内的氧气，气体总量减少
D．之后白磷燃烧没有生成二氧化碳，气体含量不变
(5)由图像中曲线②分析可知：不同可燃物在空气中燃烧除需要氧气、温度达到其着火点之外，还需要考虑的因素是 。


3、文海大联考·2026届G20高三起点考试化学答案