陕西省七年级经开区20242025学年度第二学期期末学生学业水平质量监测数学答案于2025-06-26发布，目前免费查试卷答案网站已经汇总了陕西省七年级经开区20242025学年度第二学期期末学生学业水平质量监测数学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。

试题答案

本文从以下几个角度介绍。

    2、陕西省七年级经开区2024-2025学年度第二学期期末学生学业水平质量监测数学试题


    3、陕西省七年级经开区2024-2025学年度第二学期期末学生学业水平质量监测数学试题


    To clean the river, they formed groups. Some picked up the garbage on the river surface and along the banks. They also talked to the factories near the river. At first, the factories didn't want to change, but the volunteers kept trying. They showed the factories better ways to deal with their waste, and slowly, the factories started to help.
    The volunteers also wanted to bring back the river's natural life. They planted trees and bushes along the banks to stop the soil from washing away. They also put fish and other small water animals back into the river.
    After a while, the river started to get better. The water became clearer, and more fish and birds came back. The volunteers' work not only made the river clean but also made the local people more interested in protecting the environment.
    41.What was the first step of the volunteers' project
    A. Cleaning the river.
    B. Telling people about the pollution.
    C. Studying the river.


    　 　　 　　 　
    52．任务二：根据表格内容、判断正误。
    Li Ming can eat moon cakes on his favorite holiday.
    53．At the Dragon Boat Festival, Li Ming wears is scarf, coat and trousers.
    【答案】51．B；C；A
    52．正确
    53．错误


    4、陕西省七年级经开区2024-2025学年度第二学期期末学生学业水平质量监测数学答案


    2、陕西省七年级经开区2024-2025学年度第二学期期末学生学业水平质量监测数学答案


    3、陕西省七年级经开区2024-2025学年度第二学期期末学生学业水平质量监测数学答案


    3、陕西省七年级经开区2024-2025学年度第二学期期末学生学业水平质量监测数学答案


    2、陕西省七年级经开区2024-2025学年度第二学期期末学生学业水平质量监测数学试题


    4、陕西省七年级经开区2024-2025学年度第二学期期末学生学业水平质量监测数学答案


    c(Na＋ )＜c(CH －３COO )＋c(CHCl２COO－ ),故c(Na＋ )＜c(CH３COOH)＋c(CHClCOO－２ ),D项错误.
    １５．(除特殊标注外,每空２分,共１５分)
    (１)蒸发皿(１分)
    (２)Na[Cr(OH)４]或 NaCrO２(写成[Cr(OH)]－４ 或CrO－２ 也给分)
    (３)３H２O２＋１０CH３COOH＋２CrO２－４ ２Cr３＋ ＋１０CH３COO－ ＋３O２↑＋８H２O　　降低
    (４)CrO２－２ ７ ＋２Pb２＋ ＋H２O ２PbCrO４↓＋２H＋
    (５)①滴入最后半滴 Na２S２O３,溶液蓝色褪去,且半分钟内不恢复(或者滴入最后半滴 Na２S２O３,溶液蓝色褪


    ②根据元素周期律，电负性Se S，Se在周期表中的位置 。
    ③的分子构型是 ，其中硒原子的杂化轨道类型是 。
    16．结合物质结构与性质相关知识，回答下列问题。
    (1)基态Cu原子的核外电子排布式为 。
    (2)分子的空间构型为 。分子易作为配体与形成。向盛有硫酸铜溶液的试管里加入氨水，先形成难溶物；继续滴加氨水，难溶物溶解，得到深蓝色的透明溶液，请写出难溶物溶解过程中发生反应的离子方程式 ；再加入乙醇，析出深蓝色晶体。下列对此现象说法正确的是 。
    A．深蓝色溶液中的的浓度与硫酸铜溶液中的浓度相同
    B．深蓝色晶体中的阴阳离子构型都为正四面体形


    3、陕西省七年级经开区2024-2025学年度第二学期期末学生学业水平质量监测数学答案