[智慧上进]2025届名校学术联盟〃高考模拟信息卷&冲刺卷&预测卷(七)7历史〃AH答案于2025-05-07发布,目前免费查试卷答案网站已经汇总了[智慧上进]2025届名校学术联盟〃高考模拟信息卷&冲刺卷&预测卷(七)7历史〃AH答案的各科答案和试卷,更多试卷答案请关注免费查试卷答案网站。

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C. DeepSeek-R1 has similar performance at a lower cost.
D. DeepSeek-R1 is slower but more accurate.
31. Why is DeepSeek's open - source policy important
A. It helps the company make more money.
B. It stops other companies from using its technology.
C. It slows down the development of AI.
D. It helps the global AI community develop faster.


Birdwatching is a fun hobby. You can also enjoy it. Birdwatching does not have to take a lot of time or cost much money. With materials around your house, you can build a good birdhouse. You can start birdwatching in 30 minutes in your own yard. It s easy!
Materials you will need: A milk box, glue, scissors, brown paint and tools for painting.
Steps to build a great birdhouse:
(1)Clean and dry the milk box.
(2)Glue the top of the milk box shut (关闭的).
(3)Cut holes in the milk box for the birds to get into the birdhouse. The size you cut will determine which birds can use the house. You can cut one hole per side, or two. A good place to cut is about four inches from the bottom (底部).
(4)Paint your milk box brown. The colour helps the birdhouse mix with the tree.


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(4) 不在
【解析】(1)
①HCN分子中C原子孤电子对数为,C原子形成2个σ键,所以HCN为直线形分子,键角180°;
②分子中Si原子价电子对数是4,VSEPR构型为正四面体,无孤电子对;
③分子中S原子价电子对数是4,VSEPR构型为正四面体,有2个孤电子对;
④中碳原子价电子对数为3,VSEPR构型为平面三角形,无孤电子对;
⑤中O原子价电子对数是4,VSEPR构型为正四面体,有1个孤电子对;


B.凡有规则外形的固体一定是晶体

C.晶体的各向异性和对称性是矛盾的

D.晶体一定比非晶体的熔点高
3.工业上用氨气和二氧化碳在一定条件下合成尿素。下列说法错误的是
ANH的电子式为H:N:H


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