题目

无色混合气体可能含有CO2、CO、H2O(水蒸气)、H2中的一种或几种,依次进行如下连续处理(假定每步处理均反应完全):①通过碱石灰时,气体体积变小;②通过赤热的氧化铜时,固体变为红色;③通过白色硫酸铜粉末时,粉末变为蓝色;④通过澄清的石灰水时,溶液变得浑浊。由此可以确定原混合气体中A.一定含有CO2、H2O,至少含有H2、CO中的一种B.一定含有H2O、CO,至少含有CO2、H2中的一种C.一定含有CO、CO2,至少含有H2O、H2中的一种D.一定含有C短文填空My Family Rules I have many rules in my family.Maybe you’ll say“so do I”.For me,the rules are a little strict.I can’t go out or go home________.If I do that,my mother will be worried and angry.On my school days,I can’t________TV or listen to music when I________my homework.My mother thinks they will________my study bad.________weekends,I have to do some reading and________the drum.I also have to clean my room and________my clothes.And I have to go to bed and________up early every day. The rules are strict,but I don’t mind because I think my parents love me.(1)________ (2)________ (3)________ (4)________(5)________ (6)________ (7)________ (8)________
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