[天一大联考]高三2025年普通高等学校招生全国统一考试诊断卷〃A卷生物(陕西专版)答案
[天一大联考]高三2025年普通高等学校招生全国统一考试诊断卷〃A卷生物(陕西专版)答案于2025-04-16发布,目前免费查试卷答案网站已经汇总了[天一大联考]高三2025年普通高等学校招生全国统一考试诊断卷〃A卷生物(陕西专版)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。

本文从以下几个角度介绍。
4、[天一大联考]高三2025年普通高等学校招生全国统一考试诊断卷·A卷地理(陕西专版)试题
1、[天一大联考]高三2025年普通高等学校招生全国统一考试诊断卷·A卷生物(陕西专版)试题
10.(1分)What does Bill want to be when he grows up
A.A teacher. B.A doctor. C.An artist.
三、你将听到一篇短文,短文后有五个小题。请根据短文内容,在每小题所给的A、B、C三个选项中选出一个最佳选项。短文读两遍。(共5分)
11.(1分)How long did the football season last
A.One month. B.Two months. C.Three months.
12.(1分)What was Nancy’s advantage
A.She moved very quickly. B.She passed the ball well. C.She was good at scoring.
C
At first glance, a dead tree might just look like a lifeless, fallen log. But look closer: beneath the rotting bark(树皮), the wood is full of life. Upon its death, the tree's tightly sealed tube system, previously used to transport nutrients and water, becomes empty and allows some creatures to pass through, according to Matteo Garbelotto, a professor at the University ofCalifornia, Berkeley.
These empty trunks, still standing upright, are also called snags or wildlife trees. Because of their verticality, they can host a high diversity of species that varies from top to bottom. Fallen trees, often called logs, are also valuable habitats, though for smaller species, Garbelotto says.Both types attract all sorts of life, starting with fungi (真菌) .
Fungi do much of the hard work of speeding up the decomposition process, softening the hard trunk into something with many small holes. This allows in a whole host of species seeking food and shelter: beetles get in to lay egg, amphibians nestle under the bark, and birds feeding on insects build nests within the trunk itself.
The collection of wildlife changes over the course of the tree's decay(腐烂), with each new species contributing to and profiting from the process. Logs generally increase opportunities for insects, amphibians, and reptiles and make a good combination with snags, Garbelotto says.
While some species like bark beetles and woodpeckers strongly prefer dead or rotting wood for nesting, others, including wood-decaying fungi, can only survive in deadwood.
And it's not just the animals that benefit from decaying trees. They provide natural protection and support for young seedlings to grow. As trees decompose, carbon and nitrogen stores are slowly reabsorbed into the soil, a critical step in nutrient recycling, both for young trees and for the larger ecosystem.
6、[天一大联考]高三2025年普通高等学校招生全国统一 诊断卷·A卷数学(陕西专版)答案
5、[天一大联考]高三2025年普通高等学校招生全国统一考试诊断卷·A卷生物(陕西专版)答案
1、[天一大联考]高三2025年普通高等学校招生全国统一考试诊断卷·A卷政治(陕西专版)答案
6、[天一大联考]高三2025年普通高等学校招生全国统一考试诊断卷·A卷生物学(陕西专版)答案
4、[天一大联考]高三2025年普通高等学校招生全国统一考试诊断卷·A卷地理(陕西专版)试题
6、[天一大联考]高三2025年普通高等学校招生全国统一考试诊断卷·A卷数学(陕西专版)答案
副反应:
已知:丙烯腈的产率
丙烯腈的选择性
①一定条件下,丙烯腈产率与温度的关系如图甲所示,则460℃之后产率随温度升高而降低的原因是____________________________________________。
②一定条件下,平衡时丙烯腈选择性与温度、压强的关系如图乙所示,则由小到大的顺序为__________,判断依据是_____________________________;相同压强下,丙烯腈选择性随温度升高而降低的可能原因是(不考虑催化剂失活)______________________________________。
③某温度下,向压强恒为100 kPa的密闭容器中通入、和7.5 mol空气(的体积分数为),发生上述反应。平衡时测得的转化率为90%,的物质的量为2.5 mol,则平衡时的分压为_________kPa,此温度下副反应的_________。
(2)只需一步即可完成的反应称为基元反应,基元反应如的速率方程,,。非基元反应由多个基元反应组成,非基元反应的速率方程可由反应机理推定,为非基元反应。一种可能的机理为
常温下呈液态的油脂称为 ,如花生油、芝麻油、大豆油等 油,是含较多不饱和高级脂肪酸的甘油酯;常温下呈固态的油脂称为 ,如牛油、羊油等 油脂,是含较多饱和高级脂肪酸的甘油酯。
特别提醒 酯和油脂的区别
酯是由酸(有机羧酸或无机含氧酸)与醇相互作用失去水分子形成的一类化合物的总称。而油脂仅指高级脂肪酸与甘油形成的酯,因而它是酯中特殊的一类物质。
2.油脂的性质
(1)水解反应
①硬脂酸甘油酯在酸性条件下发生水解反应的化学方程式为________________________________
___________________________________________________________________________________。
3、[天一大联考]高三2025年普通高等学校招生全国统一考试诊断卷·A卷化学(陕西专版)答案
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