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4、[衡水金卷]2025-2026学年度高二年级11月份联考(广东省)化学B版试题


setting是现在分词作结果状语，用以说明宇航员待在太空的时间很长。
②翻译：她和朋友们开启一段旅程，记录她的美好生活。
She started a journey with her friends,_______ her_______ _______ .
B
My name is Jack. After three tries, I finally passed the first aid test. I remembered my ABCs of what to do when someone is unconscious.Airway:open the airway. Breathing: check breathing and do rescue breathing. Circulation:do chest compressions (胸外按压)for circulation.These are the three key steps.
How I wanted to put my skills into practice! Every day I kept looking for possible accidents.__▲__One morning,my best friend was eating breakfast when suddenly he started coughing,"I' m ready to help."I thought.But then he stopped coughing and became fine.I felt a little down.
Later during lunchtime,my friend Bob ran to me. “Quick!” He called. "It's Tom! He's unconscious!" I rushed to help. But suddenly I couldn't remember my ABCs."No!"I shouted.Then I took a deep breath and remembered.“A for airways.”I checked Tom's mouth.It was clear but his breath smelt.As I was ready to do Step B,I thought,“Oh no.How can I deal with the smell "But quickly I realized how important it was.I pinched his nose and was about to give the mouth-to-mouth rescue breathing when Tom began laughing,and so did Bob.I realized it was all a joke.I hit Tom on the arm.I was angry at first,but then said to my friends,"Well,at least I got to practice,and maybe I'd rather not have to do it in real life,anyway!”


1.
Reuse old things
We have many old school things.Some
Do you have old things
friends need them.We can give them
Where are they now
to our friends.


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②当Kh(X－)>Ka(HX)时，X－的水解程度大于HX的电离程度，混合液呈碱性。
2．二元弱酸对应盐的水解常数
H2CO3的电离常数分别为Ka1、Ka2，则
Na2CO3溶液：CO＋H2O??HCO＋OH－
Na2CO3的水解常数：Kh＝＝＝。
NaHCO3溶液：HCO＋H2O??H2CO3＋OH－
NaHCO3的水解常数：Kh＝＝＝。


3、[衡水金卷]2025-2026学年度高二年级11月份联考(广东省)生物B版答案