【单选题】【消耗次数：1】
螯合物稳定性（），难解离，许多不溶于水，而易溶于有机溶剂。
①
稳定性一般
②
稳定性差
③
稳定性极强
④
稳定性极差
参考答案：
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【单选题】
带切口圆柱三视图正确的是<img src="https://file.icve.com.cn/ssykt/293/762/494BE9F27082F46369578F5E39161411.png"/>
①
<img src="https://file.icve.com.cn/ssykt/92/317/1734F413C584333E8D80BAE982C46850.png">
②
<img src="https://file.icve.com.cn/ssykt/943/633/EBE9E622E94B514C96E5A7F7C92EB4EB.png">
③
<img src="https://file.icve.com.cn/ssykt/312/811/4E2CAD5B3A1BD8950DDC8F573CA1A520.png">
④
<img src="https://file.icve.com.cn/ssykt/928/493/E807B7041A6F8E141A463904A473D616.png">
【单选题】
尺寸界限用（）绘制。
①
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false
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粗实线
②
细
Normal
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7.8 磅
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2
false
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font-family:等线;
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实线
③
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点划线
④
Normal
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虚线