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 the form of a Microsoft Word document.
D．It is labeled various intriguing subject lines.

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单项选择题

It is the responsibility______

A．of the teacher to make clear to the students the relevance of the activity and the target
B．of the teacher to see the relevance of what they're doing and their own personal goals
C．of the students to understand the activity cognitively before they tackle something
D．of the students to identify clearly their targets before they do anything in class

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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