According to Richard Bulliet, why does "publicizing that violence become an important part
A. Because psychological terrorism is a tactic.
Because terrorism depends on a climate of fear rather than on the actual threat.
C. Because the use of terrorism is to inspire fear that is inappropriate to the actual threat.
D. Because publicizing the violence can make more people know the actual threat.
Which of the following statement is NOT among the reasons that change the rules of psychological warfare？
A. Break the morale of their opponent.
B. Advances in technology.
C. The popularity of the Internet.
D. Prosperity of media.
According to the author, which is the best source that college students can rely upon if there are outbreaks of bird flu on college campuses？
A. The national stockpile of Tamiflu.
B. The government's medical resources.
C. Drugs provided by the feds.
D. The stockpile of the students health centers.
The cause of the transition of the Earth's magnetic field comes from______.
A. the movement deep inside the Earth
B. the periodical reverses of the Earth
C. the force coming from outer space
D. the mechanical movement of the Earth
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