1.计算题- (共1题)
(1)该反应属于____________(填基本反应类型)。
(2)求黄铜样品中锌的质量分数为________(写计算过程)。
2.单选题- (共5题)

A.该净水器中的活性炭起吸附作用 |
B.该净水器可以降低自来水的硬度 |
C.该净水器能起到杀菌消毒的作用 |
D.该净水器可将自来水变为蒸馏水 |
3.选择题- (共1题)
根据短文内容,从短文后的选项中选出能填入空白处的最佳选项。
The benefits of keeping a journal(日志)
If you want to grow, one important thing you should do is keep a journal. It may seem simple, but it can make a big difference in your life. I have been keeping journals for years. Writing all the lessons I learn and all the ideas I get has become a habit for me. {#blank#}1{#/blank#} Here are some benefits you will get by keeping a journal.
♦ It prevents you from losing an idea. Have you ever gotten an idea and lost it later because you didn't write it down? {#blank#}2{#/blank#} But then I developed the habit of writing down every idea that came into my mind as soon as possible. If I am away from my computer, I usually write it down on a piece of paper that I bring wherever I go. I will then transfer the idea to the journal in my computer.
♦ It helps you review all the lessons you've learned. By reviewing your journal, you can quickly see the lessons you've learned and the ideas you've gotten. {#blank#}3{#/blank#} You can use the ideas to propel yourself forward.
♦ {#blank#}4{#/blank#} After keeping a journal for years, you can look back at it and see how far you've gone. Things that were big problems in the past might seem small today. The raw ideas you had in the past have been realized today.
♦ It helps you expand your ideas. When you try to come up with a sentence to express an idea, you are thinking actively about it. {#blank#}5{#/blank#} In the end, you will expand your ideas.
A.I often experienced that myself.
B.It trains you to express your thoughts.
C.It allows you to see your progress over time.
D.Just use whatever tool you feel comfortable with.
E.Thinking actively helps you connect your idea to another idea.
F.And to be honest, I can't imagine what my life would be like without it.
G.Then you can do whatever necessary to avoid repeating the same mistakes.
4.填空题- (共3题)

请回答下列问题:
(1)A的化学式为 ;反应①②③都不涉及的基本反应类型是 反应。
(2)牛牛认为CaCO3经一步反应就可转化为CaCl2,反应的化学方程式为 。
(3)对比两同学的转化方法,我们发现熟练掌握物质的化学性质可以优化物质的转化途径。写出物质B经一步转化为CaCO3的化学方程式 。

(1)与C相比,A、B发电的共同优点是_________________________(写一条)。
(2)A的能量转化方式是把______能经过一系列变化转化成电能。
5.实验题- (共1题)
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【1】题量占比
计算题:(1道)
单选题:(5道)
选择题:(1道)
填空题:(3道)
实验题:(1道)
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【2】:难度分析
1星难题:0
2星难题:0
3星难题:0
4星难题:2
5星难题:0
6星难题:5
7星难题:0
8星难题:2
9星难题:1