设nA为阿伏伽德罗常数的数值,下列说法正确的是

设nA为阿伏伽德罗常数的数值,下列说法正确的是 A.23g Na 与足量H2O反应完全后可生成nA个H2分子 B.1 molCu和足量热浓硫酸反应可生成nA个S

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What is the probable relationship between the speakers?

What is the probable relationship between the speakers?A.Salesperson and custome

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What is the woman's opinion about the course?

What is the woman's opinion about the course?A.Too hard. B.Worth taking. C.Very

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-2,-8,0,64,(  )

-2,-8,0,64,(  )A.-64 B.128 C.156 D.250

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66,40,24,20,(  )

66,40,24,20,(  )A.12 B.14 C.10 D.32

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