“邮件病毒”和普通的病毒在程序上是一样，只不过由于它们的传播途径主要是通过电子邮件，所以才被称为“邮件病毒”。
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A vessel is heading magnetic east and its magnetic compass indicates a heading of 086°. Which action should be taken to remove this error during compass adjustment?（）
A. If the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should add some magnets.
B. If the blue ends of the magnets are aft you should lower the fore-and-aft tray
C. If the blue ends of the magnets are aft，and the fore-and-aft tray is at the top，you should reverse the magnets
D. If the blue ends of the magnets are forward，and the fore-and-aft tray is at the bottom，you should add some magnet
股权的具体体现形式是（）。
A. 证券
B. 票据
C. 股票
D. 股权
一个消防队员如果能将自己的心理准备与（）、结合起来，他就能在火场上巧妙而迅速的执行战斗任务。
A. 灭火行动
B. 救援活动
C. 专业技术
D. 专业技能
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