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    6、2025~2026学年辽宁省高二12月月考(26-T-328B)数学试题


    6、2025~2026学年辽宁省高二12月月考(26-T-328B)数学试题



    In today's digital world, mobile apps make our lives easier and more enjoyable. There are several types of apps that bring great convenience to our daily routines.
    Food delivery apps are very popular. With just a few taps on your phone, you can order delicious meals from nearby restaurants and have them delivered to our door. No need to cook or go out when you're tired! Map navigation apps are also a must - have. They help you find the best routes to your destination, show real - time traffic information, and even tell you where the nearest bus stop is.
    Shopping apps allow you to buy clothes, books, and electronics without leaving home. You can compare prices, read reviews, and get great deals. Learning apps are useful for students. They provide English lessons, math exercises, and science experiments,helping you study anytime, anywhere.
    These convenient apps have truly changed the way we live.
    ( )5. What can food delivery apps do
    A.Teach people how to cook.
    B. Deliver meals ordered from restaurants.


    1、2025~2026学年辽宁省高二12月月考(26-T-328B)数学试题


    1、2025~2026学年辽宁省高二12月月考(26-T-328B)数学试题


    6、2025~2026学年辽宁省高二12月月考(26-T-328B)数学试题


    2、2025~2026学年辽宁省高二12月月考(26-T-328B)数学试题


    6、2025~2026学年辽宁省高二12月月考(26-T-328B)数学试题


    1、2025~2026学年辽宁省高二12月月考(26-T-328B)数学试题


    操作
    连接橡胶塞
    收集并测定氧气的体积
    给液体加热
    收集满氧气后盖上玻璃片
    1/8
    5小明同学加热2~3L蒸馏水,操作的正确顺序应该是、


    15.实验室中,从海藻里提取碘的部分流程如下图。下列说法中,错误的是( )。
    A.试剂a可选用酸化的双氧水
    B.试剂b可选用四氯化碳
    C.步骤①需用坩埚,步骤②需用烧杯
    D.步骤③的操作是分液
    【答案】D
    【解析】海带灼烧可生成水和二氧化碳,海带灰中含有碘化钾等物质,溶于水,浸泡过滤得到含有碘离子的溶液,通入氯气等氧化性物质,可以氧化生成碘,得到碘的水溶液,用有机溶剂萃取得到含碘的有机溶液。试剂a应该是具有氧化性的物质,可选用酸化的双氧水,A不符合题意;四氯化碳与水不互溶,且碘在四氯化碳中的溶解度大于在水中的溶解度,故能萃取碘水中的碘,B不符合题意;步骤①灼烧海带应该在坩埚中进行,步骤②浸泡海藻灼烧物时溶解,需用烧杯,C不符合题意;根据流程图,步骤③分离得到了溶液和灰渣,应该选用过滤,D符合题意。


    3、2025~2026学年辽宁省高二12月月考(26-T-328B)数学答案