单选题 较易0.85 引用2 组卷65
下列仪器常用于物质分离的是
①
②
③
④![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/1a44576d-584e-42f1-89dd-b0b8a37dc684.png?resizew=66)
①
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/4f38c1e9-4bf1-4e13-9d4e-d4c6cad088a1.png?resizew=38)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/261e0eaa-2cf2-4a5a-821d-f5e66ccf6f2f.png?resizew=66)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/b918c34d-279d-42fc-ac39-146efce6f528.png?resizew=42)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/4/1a44576d-584e-42f1-89dd-b0b8a37dc684.png?resizew=66)
A.②③ | B.①④ | C.②④ | D.①② |
19-20高一·湖南长沙·期中
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下列有关说法正确的是
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/efdfe073-df5a-4e6c-adfe-bf9341d8e6b7.png?resizew=168)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/7/efdfe073-df5a-4e6c-adfe-bf9341d8e6b7.png?resizew=168)
A.容量瓶、分液漏斗、冷凝管等仪器在使用前均需要检查是否漏液 |
B.蒸发、蒸馏、配制标准物质的量浓度溶液均需要用到玻璃棒 |
C.用MnO2与H2O2制备O2,可用如图装置控制反应“随开随用,随关随停” |
D.烧杯、圆底烧瓶、锥形瓶加热前必须擦干外壁并垫上石棉网 |
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