东北三省2026年高三年级模拟考试(3月)政治试题

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东北三省2026年高三年级模拟考试(3月)政治试题于2026-04-01发布，目前已经汇总了东北三省2026年高三年级模拟考试(3月)政治试题的各科答案和试卷，更多试卷答案请关注本网站。

试题答案

本文从以下几个角度介绍。

东北三省2026年高三年级模拟考试(3月)政治试题

D．It organizes activities in kids’ spare time.
C
We’re frequently told that our attention problem—being easily distracted—results from modern technology.If we truly want to focus，according to the popular belief，we need to turn off all our digital devices and quit social media.
Here’s my opinion about that idea.This era(时代) is no different than any other—there has always been a “crisis of attention”．Think about life long ago：people in ancient India or Europe didn’t have smartphones and social media，but they were faced with the same problem.
A crisis of attention can happen anytime you don’t allow yourself a break—when you don’t allow your mind to daydream，which may inspire your creativity.We are always engaged in something.With these digital tools at our fingertips，we have constant access to all these forms of communication，content，and interaction，and we don’t let our thoughts wander(漫游) freely.When was the last time you stood in line at a store and just looked around Thought about whatever came to your mind Or did you pull out your phone，check your texts，read your email during that time
We all do it.We catch ourselves all the time going from one type of mental engagement to the next.Like surfing online (clicking from link to link)，we go from one task to the next and the next.We are “all task and no downtime”．Even something you might think of as relaxing is more engagement.Checking your phone messages may seem “fun”，but it’s just another task for your attention.Your attention is focused on task after task after task，without a moment for the mind to wander freely.
It’s not always realistic to unplug.We can’t just turn off our phones and pause our email.We can’t create a distraction-free world.The problem is not the existence of modern technology; rather，it’s how we’re using it.

东北三省2026年高三年级模拟考试(3月)生物试题

5、东北三省2026年高三年级模拟 (3月)地理试题

4.一年中,该河流补给湖泊大约有 (　　)
A.3个月 B.4个月
C.8个月 D.9个月
5.河湖相通处河湖之间水流速度最快的时间点是 (　　)
A.① B.②
C.③ D.④
6.该湖泊最可能位于 (　　)

1、东北三省2026年高三年级模拟考试(3月)英语试题

5、东北三省2026年高三年级模拟考试(3月)生物试题

【解析】【解答】（1）根据核反应方程，反应前氢核的质量数总和为4，电荷数总和为4×1。反应后两个正电子的质量数总和为2×0=0，电荷数总和为2×1=2。设X的质量数为A，电荷数为Z，则有A+0=4，Z+2=4，解得A=4，Z=2，的质量数为4，电荷数为2，故选B。
（2）复色光的频率~，当光的频率大于金属板的极限频率时，可发生光电效应，对比可知可发生光电效应的钠、钾、铷，故选CDE。
（3）电子绕氢原子核做匀速圆周运动，库仑力提供向心力，整理得
电子动量大小是
（4）氢原子从高能级向低能级跃迁时会放出光子，光子的能量等于两个能级的能量差。氢原子能级公式为，光子的能量
根据巴耳末-里德伯公式，又因为，可得
其中n是跃迁前的能级，k是跃迁后的能级。氢原子从n=4跃迁到n=2，n=4，k=2，根据可得，且是从高能级向低能级跃迁，放出光子，D正确。故选D。

东北三省2026年高三年级模拟考试(3月)化学答案

东北三省2026年高三年级模拟考试(3月)政治试题

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