1.单选题- (共15题)

A.(1)为物理变化,(2)为化学变化 | B.均为化学变化 |
C.(1)为化学变化,(2)为物理变化 | D.均为物理变化 |
A.固体碘受热后变成紫红色碘蒸气 |
B.打开浓盐酸瓶盖,从瓶口涌出白雾 |
C.澄清石灰水露置空气中后液面产生了一层白膜 |
D.通常状况下的氧气通过低温加压变成了淡蓝色液体 |
A.用酒精灯加热试管里的液体时,试管里的液体不应超过试管溶剂的1/2 |
B.实验后剩余的药品应放回原试剂瓶中,避免浪费 |
C.洗过的玻璃仪器内壁附着的水滴既不聚成水滴,也不成股流下时,表明仪器已洗干净 |
D.不小心碰倒酒精灯,洒出的酒精在桌上燃烧起来时,应立即用水扑灭 |
A.实验 | B.假设 | C.观察 | D.做结论 |
A.反复实验,并观察是否有相同现象 |
B.认为与本实验目的无关,不予理睬 |
C.询问老师或同学,讨论生成黑色物质的原因 |
D.查找资料,了解石蜡的主要成分,探究生成的黑色固体是什么 |
2.选择题- (共3题)
【民族团结 美丽西藏】
2015年9月8日,西藏自治区成立五十周年庆祝大会隆重举行,习近平在贺匾上题词“加强民族团结 建设美丽西藏”。50年来,自治区经济发展迅速。你认为西藏取得成就的原因有哪些?
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.
3.多选题- (共1题)
4.填空题- (共2题)
(1)试剂瓶上的标签未朝向手心:____________________________;
(2)试剂瓶瓶塞正放在桌面上:______________________________;
(3)对外壁不干燥的试管加热:______________________________;
(4)用量筒量取液体药品时采用俯视读数:________________________;
(5)用嘴吹灭酒精灯:________________________。

(1)用来吸取和滴加少量液体的仪器是_________;
(2)可以直接加热的仪器是_________;
(3)用作量度一定量液体体积的仪器是___________;
(4)实验室常用的加热仪器是_________;
(5)可以用来收集气体的仪器是___________;
5.实验题- (共1题)
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【1】题量占比
单选题:(15道)
选择题:(3道)
多选题:(1道)
填空题:(2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:0
5星难题:0
6星难题:1
7星难题:0
8星难题:9
9星难题:9