What does the plus sign + mean in chemical equations？

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  A . 如果你学会理解这些姿势，你就会分辨出一个人说的是否是他真正的意思，或者他是否像那种“笑里藏刀”的人在试图蒙蔽你。 B . 如果你学会理解这些姿势，你就会分辨出一个人是否口是心非，是否像那种“笑里藏刀”的人试图蒙蔽你。 C . 如果你学会理解这些姿势，你就会分辨出一个人所说的话是否是他真正要表达的东西，是否是那种“笑里藏刀”的人试图蒙蔽你。

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• What does the SCN represent?（）

  A . The system change number, which is a point in time relative to transactions within a given database.  B . A number that represents time. Thus, at 1300 hours, the SCN is the same on all databases.  C . The security change number, which represents the security code that is needed to access any database structure. D . A conversion factor that converts internal database time to external clock time.  E . UTC time in the database, providing a standardized way of tracking time in Oracle.&e

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• What does the man mean?

  A . There’S been nothing but rain for quite some time． B . He’S bored with the changing weather． C . He thinks that it’11 rain for three more weeks． D . He’S bored about the topic on weather．

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• The second engineer seemed to know what the sign （）.

  A . stand by B . stand for C . stood by D . stood for

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• What does the SCN represent？（）  

  A .  The system change number， which is a point in time relative to transactions within a given database. B .  A number that represents time. Thus， at 1300 hours， the SCN is the same on all databases.  C .  The security change number， which represents the security code that is needed to access any database structure. D .  A conversion factor that converts internal database time to external clock time. E .  UTC time in the database，providing a standardized way of tracking time in Oracle.

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• What does the woman ask the man？

  A．Where he lives B．Where he is from C．Who he spoke with D．What he does for a living

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  A．A promotion B．Career advice C．Freelance work D．A job with Drake

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  A．指示标志 B．警告标志 C．禁止标志 D．许可标志

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• What does the phrase “vital signs” mean？

  A．生命体征 B．生命迹象 C．重要标志 D．生命标志

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• What does Seligman mean by saying "take a plus 2 person and boost him to a plus 6"（）

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• What does the phrase “ vital signs ” mean？

  A．生命体征 B．生命迹象 C．重要标志 D．生命标志

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• What can you do if you've noticed some of the signs of stress mentioned in the passage（）

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