
初三下册第9+10+11章测试
Quiz
•
Science
•
9th Grade
•
Practice Problem
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Medium
沈宛慧(古晋一中) 沈宛慧(古晋一中)
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50 questions
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1.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列属于地球资源,但是不属于可更新资源的是( )
2.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列物质中,不属于合成材料的是( )
3.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
合成橡胶广泛应用于工农业、国防、交通及日常生活中,下列选项中哪些不是合成橡胶的优点?
4.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
地球上的淡水资源主要分布在( )
5.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
生产自来水时,自来水厂将根据水质情况在沉淀池中投加絮凝剂,以便水中的颗粒物形成颗粒胶体沉至池底。自来水厂所使用的絮凝剂可能是( )
6.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
硬水加热后会形成水垢,影响传热性能。这是因为硬水在加热的过程中会形成( )
①碳酸钙 ②硫酸钙 ③氢氧化镁 ④氧化镁
②③
①④
①③
②④
7.
MULTIPLE CHOICE QUESTION
2 mins • 1 pt
下列都是工业上常用的使硬水变软水的方法,除了
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