【单选题】【消耗次数:1】
下列不是用来作为制备微孔硅酸钙的原料的是( )。
粉状二氧化硅质材料
石灰
纤维增强材料
石膏
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相关题目
【判断题】 耐火性材料是指二氧化硅为主要成分的耐火材料
①  正确
②  错误
【单选题】 微孔硅酸钙保温材料的主要缺点是( )。
①  吸水性强
②  保温性差
③  表观密度小
④  强度高
【判断题】 粉尘中游离二氧化硅导致肺组织纤维化,最终导致尘肺病
①  正确
②  错误
【单选题】 以二氧化硅为乳化剂形成乳剂,其乳化膜是( )。
①  单分子乳化膜
②  多分子乳化膜
③  固体粉末乳化膜
④  复合凝聚膜
【单选题】 矽尘作业通常是指粉尘中含游离二氧化硅在(  )
①  20%以上的作业
②  15%以上的作业
③  10%以上的作业
④  5%以上的作业
【单选题】 在完全水化的硅酸盐水泥石中,水化硅酸钙约占()。  
①  30%  
②  70%  
③  50%  
④  90%
【单选题】 可以用来检验二氧化碳气体的是()
①  A水
②  B食盐水
③  C糖水
④  D澄清石灰水
【多选题】 下列可以用来作为分配材料采购费用标准的有( )
①  材料的买价
②  材料的重量
③  材料的种类
④  材料的体积
⑤  以上各项均可以
【判断题】 二氧化钛的氧传感器是利用半导体材料的二氧化钛的电阻值随氧含量的变化而改变的特性制成的。()
①  正确
②  错误
【单选题】 二氧化碳被称为温室气体,是因为二氧化碳能()。
①  A.吸收太阳辐射,使人体增温
②  B.破坏臭氧,使到达地面的紫外线增多
③  C.强烈地吸收地面放出的长波辐射
④  D.通过光化学反应向大气中释放热能
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