单项选择题

What makes it more difficult to deal with the virus named SirCam

A．It will regularly pop up even when discovered.
B．It has a staying power in social engineering.
C．It takes a Microsoft Word document.
D．It is labeled various intriguing subject lines.

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单项选择题

The main idea of the second paragraph is

A．how to avoid double-click on infected email attachments.
B．how emails both carry and spread viruses and worms.
C．what new viruses can automatically launch themselves.
D．what new viruses are capable of with an double-click on.

单项选择题

Which of the following statements is true, according to the author

A．Mimicking is the most difficult task for the teacher and students as well.
B．The teacher has to explain to the students without taking up too much time.
C．The sessions are essential to the students' carrying out the particular activities.
D．Once the target of the activity is settled, nothing should change any mor

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