Half.com’s Take Five! Program is another example of viral marketing, where registered users at the site selling used books, music, movies, and games are given an incentive, such as coupons to tell the
A. viral marketing
B. video advertising
C. microblog marketing
D. Integrated marketing
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The stress perpendicular to the section is called（）
A. Total stress
B. Normal stress
C. Shear stress
D. Principal stress
The basic method to study the internal forces of components in material mechanics is（）
A. Superposition method
B. Method of section
C. Force method
D. Energy method
The operation model of C2C e-commerce does not include__（）
A. Online auction
B. Third-party trading platform
Classified advertising
D. Online gift model
All of the following are types of firewall except（）
A. Packet Filtering Firewall
B. Proxy Firewall
C. Stateful Inspection Firewall
D. IDS Firewall
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