题目

用方框中词的适当形式填空,每空限填一词。are  pencil  a  she  he  on  cousin  family  parent  good Hello , I’m Kate. Today is Sunday . My __1___are all at home. My grandparents are in the living room (客厅). They like watching TV. They have _2___color TV. Look, that is my __3___. She is a nice girl . ___4__ name is Mary Smith. She has two erasers and three___5___. My little brother Jack is __6__ the sofa. __7___ is playing computer game. My __8____ are in the kitchen(厨房). They are cooking. Mary and I __9___ in the same school . We are ___10___students.自然界地表层原生铜的硫化物经氧化、淋滤作用后变成CuSO4溶液,向地下深层渗透,遇到难溶的ZnS或PbS,慢慢转变为铜蓝(CuS)。下列分析不正确的是(   ) A. CuS的溶解度小于PbS的溶解度 B. CuSO4与ZnS反应的离子方程式是Cu2++S2-= CuS↓ C. 整个过程涉及的反应类型有氧化还原反应和复分解反应 D. 原生铜的硫化物和铜蓝都具有还原性
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