.对反应aA+bB=cC+Dd,其a/b的意义是 AD 中 2 4 A物质与B物质的物质的量之比 A物质与B物质的摩尔比 A物质与B物质的摩尔数之比 A物质与B物质的化学计量系数之比
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举一反三
【单选题】Task 2 Directions: The following is a poster. After reading it, you will find 3 questions or unfinished statements, numbered 45 to 47. For each question or statement, there are 4 choices marked A), B)...
【简答题】45-47 题 Directions : The following is a poster. After reading it, you will find 3 questions or unfinished statements, numbered 45 to 47. For each question or statement, there are 4 choices marked A, B...