[点石联考]2025年点石联考东北"三省一区"高三12月份联合考试英语答案

[点石联考]2025年点石联考东北"三省一区"高三12月份联合考试英语答案于2025-12-10发布，目前已经汇总了[点石联考]2025年点石联考东北"三省一区"高三12月份联合考试英语答案的各科答案和试卷，更多试卷答案请关注本网站。

本文从以下几个角度介绍。

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[点石联考]2025年点石联考东北"三省一区"高三12月份联合考试英语试题

[点石联考]2025年点石联考东北"三省一区"高三12月份联合考试语文试题

What made the chick calm down
A. A new nest. B. Some food. C. A recording. D. Its parents.
How would the author feel about the result of the event
A. It was unexpected. B. It was beautiful. C. It was funny. D. It was disappointing.
D
English is a very interesting language. It has borrowed words from many other languages. Immigrants (移民) coming into the United States have contributed many words to the language, which have kept their original pronunciation. “Coolie” ( 苦力) and “kowtow” ( 叩头) were taken from the Chinese language, “kamikaze” from Japanese, “shampoo” from Indian, “blitz” from German, “amigo” and “Los Angeles” from Spanish and so on.
Many students have studied English for years, some as many as eight. However, some students still have difficulty in speaking fluent English. Some know many words, but are unable to discern them when native speakers use them. In our oral English classes, we will focus on speaking and listening to native English speakers. Because we are trying to train your ears to hear English and your mouths to speak intelligible (易理解的) English, we will have a rule that ONLY ENGLISH will be spoken in our English classes. Anyone

5、[点石联考]2025年点石联考东北"三省一区"高三12月份联合 英语答案

6、[点石联考]2025年点石联考东北"三省一区"高三12月份联合考试英语答案

2、[点石联考]2025年点石联考东北"三省一区"高三12月份联合考试物理答案

3、[点石联考]2025年点石联考东北"三省一区"高三12月份联合考试物理试题

5、[点石联考]2025年点石联考东北"三省一区"高三12月份联合考试 政治答案

15.答案　(1)　(2)mg　(3)2mg
解析　(1)当水平转盘以角速度ω1匀速转动时,绳上恰好有张力,此时物块受到的静摩擦力达到最大,由牛顿第二定律得μmg=mr=mlsin θ
代入数据解得ω1=。
(2)当水平转盘以角速度ω2=匀速转动时,由于ω2<ω1,由静摩擦力提供向心力,则有
Ff=mr=mlsin θ
解得Ff=mg。
(3)当支持力为零时,物块所需要的向心力由重力和细绳拉力的合力提供,由牛顿第二定律得

[点石联考]2025年点石联考东北"三省一区"高三12月份联合考试数学答案